Dopo l'installazione di kubuntu 18.04 in dualboot con win 10 mi ritrovo davanti la schermata nera con la bash del grub. ho un boot efi. l'avvio è in modalità efi. prima di kubuntu avevo installato ubuntu 18.04. non ho cambiato nulla nelle impostazioni. semplicemente ho avviato la chiavetta di kubuntu e l'ho installato nella partizione dove prima c'era ubuntu.

Vi giro il report di boot-repair che non è riuscito a correggere il problema:

     Boot Info Script 8f991e4 + Boot-Repair extra info      [Boot-Info 25oct2017]

============================= Boot Info Summary: ===============================

 => Grub2 (v1.99-2.00) is installed in the MBR of /dev/sda and looks at sector 
    1743866680 of the same hard drive for core.img, but core.img can not be 
    found at this location.
 => No known boot loader is installed in the MBR of /dev/sdb.

sda1: __________________________________________________________________________

    File system:       ntfs
    Boot sector type:  Windows 8/2012: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:

sda2: __________________________________________________________________________

    File system:       vfat
    Boot sector type:  Windows 8/2012: FAT32
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:

sda3: __________________________________________________________________________

    File system:       vfat
    Boot sector type:  Windows 8/2012: FAT32
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:

sda4: __________________________________________________________________________

    File system:       
    Boot sector type:  -
    Boot sector info: 
    Mounting failed:   mount: /mnt/BootInfo/sda4: unknown filesystem type ''.

sda5: __________________________________________________________________________

    File system:       ntfs
    Boot sector type:  Windows 8/2012: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:

sda6: __________________________________________________________________________

    File system:       ntfs
    Boot sector type:  Windows 8/2012: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:

sda7: __________________________________________________________________________

    File system:       ntfs
    Boot sector type:  Windows 8/2012: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:

sda8: __________________________________________________________________________

    File system:       ext4
    Boot sector type:  -
    Boot sector info: 
    Operating System:  Ubuntu 18.04 LTS
    Boot files:        /boot/grub/grub.cfg /etc/fstab 
                       /boot/grub/i386-pc/core.img

sdb1: __________________________________________________________________________

    File system:       iso9660
    Boot sector type:  Unknown
    Boot sector info: 
    Mounting failed:   mount: /mnt/BootInfo/sda4: unknown filesystem type ''.
mount: /mnt/BootInfo/sdb1: /dev/sdb1 already mounted or mount point busy.

sdb2: __________________________________________________________________________

    File system:       vfat
    Boot sector type:  FAT16
    Boot sector info:  According to the info in the boot sector, sdb2 starts 
                       at sector 0. But according to the info from fdisk, 
                       sdb2 starts at sector 3572460. According to the info 
                       in the boot sector, sdb2 has 0 sectors.
    Mounting failed:   mount: /mnt/BootInfo/sda4: unknown filesystem type ''.
mount: /mnt/BootInfo/sdb1: /dev/sdb1 already mounted or mount point busy.
mount: /mnt/BootInfo/sdb2: /dev/sdb2 already mounted or mount point busy.

============================ Drive/Partition Info: =============================

Drive: sda _____________________________________________________________________
Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt

Partition  Boot  Start Sector    End Sector  # of Sectors  Id System

/dev/sda1                   1 1,953,525,167 1,953,525,167  ee GPT

GUID Partition Table detected.

Partition  Attrs   Start Sector    End Sector  # of Sectors System
/dev/sda1      R          2,048     2,050,047     2,048,000 Windows Recovery Environment (Windows)
/dev/sda2      R      2,050,048     2,582,527       532,480 EFI System partition
/dev/sda3      R      2,582,528     4,630,527     2,048,000 -
/dev/sda4             4,630,528     4,892,671       262,144 Microsoft Reserved Partition (Windows)
/dev/sda5             4,892,672 1,611,857,919 1,606,965,248 Data partition (Windows/Linux)
/dev/sda6         1,874,003,968 1,926,432,767    52,428,800 Data partition (Windows/Linux)
/dev/sda7      R  1,926,432,768 1,953,523,711    27,090,944 Windows Recovery Environment (Windows)
/dev/sda8         1,611,857,920 1,874,003,967   262,146,048 Data partition (Linux)

Attributes: R=Required, N=No Block IO, B=Legacy BIOS Bootable, +=More bits set

Drive: sdb _____________________________________________________________________
Disk /dev/sdb: 3.8 GiB, 4007657472 bytes, 7827456 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos

Partition  Boot  Start Sector    End Sector  # of Sectors  Id System

/dev/sdb1    *              0     3,648,511     3,648,512   0 Empty
/dev/sdb2           3,572,460     3,577,131         4,672  ef EFI (FAT-12/16/32)

/dev/sdb1 overlaps with /dev/sdb2

GUID Partition Table detected, but does not seem to be used.

Partition  Attrs   Start Sector    End Sector  # of Sectors System
/dev/sdb1   +  R              0     3,648,455     3,648,456 Data partition (Windows/Linux)
/dev/sdb2   +  R      3,572,460     3,577,131         4,672 Data partition (Windows/Linux)

Attributes: R=Required, N=No Block IO, B=Legacy BIOS Bootable, +=More bits set

"blkid" output: ________________________________________________________________

Device           UUID                                   TYPE       LABEL

/dev/loop0                                              squashfs   
/dev/sda1        90A8704FA87035B6                       ntfs       WINRE_DRV
/dev/sda2        4672-B8C1                              vfat       SYSTEM_DRV
/dev/sda3        0276-6D05                              vfat       LRS_ESP
/dev/sda4                                                          
/dev/sda5        18FC79B9FC7991AC                       ntfs       Windows8_OS
/dev/sda6        7824F6A424F66492                       ntfs       LENOVO
/dev/sda7        848C7DA38C7D9082                       ntfs       PBR_DRV
/dev/sda8        d9ded76f-31ac-4151-9cf3-054226526613   ext4       
/dev/sdb1        2018-04-26-18-48-55-00                 iso9660    Kubuntu 18.04 LTS amd64
/dev/sdb2        044E-AC17                              vfat

========================= "ls -l /dev/disk/by-id" output: ======================

total 0
lrwxrwxrwx 1 root root  9 Jul 11 09:17 ata-HL-DT-ST_DVDRAM_GU90N_KM2DBRF5742 -> ../../sr0
lrwxrwxrwx 1 root root  9 Jul 11 10:02 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68 -> ../../sda
lrwxrwxrwx 1 root root 10 Jul 11 10:04 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Jul 11 10:02 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 Jul 11 10:02 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68-part3 -> ../../sda3
lrwxrwxrwx 1 root root 10 Jul 11 10:02 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68-part4 -> ../../sda4
lrwxrwxrwx 1 root root 10 Jul 11 10:04 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68-part5 -> ../../sda5
lrwxrwxrwx 1 root root 10 Jul 11 10:04 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68-part6 -> ../../sda6
lrwxrwxrwx 1 root root 10 Jul 11 10:04 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68-part7 -> ../../sda7
lrwxrwxrwx 1 root root 10 Jul 11 10:02 ata-WDC_WD10JPCX-24UE4T0_WD-WXH1E93HXD68-part8 -> ../../sda8
lrwxrwxrwx 1 root root  9 Jul 11 10:02 usb-_USB_Flash_Memory_5B84140012B5-0:0 -> ../../sdb
lrwxrwxrwx 1 root root 10 Jul 11 10:02 usb-_USB_Flash_Memory_5B84140012B5-0:0-part1 -> ../../sdb1
lrwxrwxrwx 1 root root 10 Jul 11 10:02 usb-_USB_Flash_Memory_5B84140012B5-0:0-part2 -> ../../sdb2
lrwxrwxrwx 1 root root  9 Jul 11 09:17 wwn-0x5001480000000000 -> ../../sr0
lrwxrwxrwx 1 root root  9 Jul 11 10:02 wwn-0x50014ee6040e7308 -> ../../sda
lrwxrwxrwx 1 root root 10 Jul 11 10:04 wwn-0x50014ee6040e7308-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Jul 11 10:02 wwn-0x50014ee6040e7308-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 Jul 11 10:02 wwn-0x50014ee6040e7308-part3 -> ../../sda3
lrwxrwxrwx 1 root root 10 Jul 11 10:02 wwn-0x50014ee6040e7308-part4 -> ../../sda4
lrwxrwxrwx 1 root root 10 Jul 11 10:04 wwn-0x50014ee6040e7308-part5 -> ../../sda5
lrwxrwxrwx 1 root root 10 Jul 11 10:04 wwn-0x50014ee6040e7308-part6 -> ../../sda6
lrwxrwxrwx 1 root root 10 Jul 11 10:04 wwn-0x50014ee6040e7308-part7 -> ../../sda7
lrwxrwxrwx 1 root root 10 Jul 11 10:02 wwn-0x50014ee6040e7308-part8 -> ../../sda8

================================ Mount points: =================================

Device           Mount_Point              Type       Options

/dev/loop0       /rofs                    squashfs   (ro,noatime)
/dev/sda8        /mnt                     ext4       (rw,relatime,data=ordered)
/dev/sdb         /cdrom                   iso9660    (ro,noatime,nojoliet,check=s,map=n,blocksize=2048)

=========================== sda8/boot/grub/grub.cfg: ===========================

--------------------------------------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}
function recordfail {
  set recordfail=1
  if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_gpt
insmod ext2
set root='hd0,gpt8'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt8 --hint-efi=hd0,gpt8 --hint-baremetal=ahci0,gpt8  d9ded76f-31ac-4151-9cf3-054226526613
else
  search --no-floppy --fs-uuid --set=root d9ded76f-31ac-4151-9cf3-054226526613
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=it_IT
  insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
  set timeout=10
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=10
  # Fallback normal timeout code in case the timeout_style feature is
  # unavailable.
  else
    set timeout=10
  fi
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
    set gfxpayload="${1}"
    if [ "${1}" = "keep" ]; then
        set vt_handoff=vt.handoff=1
    else
        set vt_handoff=
    fi
}
if [ "${recordfail}" != 1 ]; then
  if [ -e ${prefix}/gfxblacklist.txt ]; then
    if hwmatch ${prefix}/gfxblacklist.txt 3; then
      if [ ${match} = 0 ]; then
        set linux_gfx_mode=keep
      else
        set linux_gfx_mode=text
      fi
    else
      set linux_gfx_mode=text
    fi
  else
    set linux_gfx_mode=keep
  fi
else
  set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'GNU/Linux' --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-d9ded76f-31ac-4151-9cf3-054226526613' {
    recordfail
    load_video
    gfxmode $linux_gfx_mode
    insmod gzio
    if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
    insmod part_gpt
    insmod ext2
    set root='hd0,gpt8'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt8 --hint-efi=hd0,gpt8 --hint-baremetal=ahci0,gpt8  d9ded76f-31ac-4151-9cf3-054226526613
    else
      search --no-floppy --fs-uuid --set=root d9ded76f-31ac-4151-9cf3-054226526613
    fi
        linux   /boot/vmlinuz-4.15.0-23-generic root=UUID=d9ded76f-31ac-4151-9cf3-054226526613 ro  quiet splash $vt_handoff
    initrd  /boot/initrd.img-4.15.0-23-generic
}
submenu 'Advanced options for GNU/Linux' $menuentry_id_option 'gnulinux-advanced-d9ded76f-31ac-4151-9cf3-054226526613' {
    menuentry 'GNU/Linux, with Linux 4.15.0-23-generic' --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-23-generic-advanced-d9ded76f-31ac-4151-9cf3-054226526613' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt8'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt8 --hint-efi=hd0,gpt8 --hint-baremetal=ahci0,gpt8  d9ded76f-31ac-4151-9cf3-054226526613
        else
          search --no-floppy --fs-uuid --set=root d9ded76f-31ac-4151-9cf3-054226526613
        fi
        echo    'Loading Linux 4.15.0-23-generic ...'
            linux   /boot/vmlinuz-4.15.0-23-generic root=UUID=d9ded76f-31ac-4151-9cf3-054226526613 ro  quiet splash $vt_handoff
        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-4.15.0-23-generic
    }
    menuentry 'GNU/Linux, with Linux 4.15.0-23-generic (recovery mode)' --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-23-generic-recovery-d9ded76f-31ac-4151-9cf3-054226526613' {
        recordfail
        load_video
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt8'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt8 --hint-efi=hd0,gpt8 --hint-baremetal=ahci0,gpt8  d9ded76f-31ac-4151-9cf3-054226526613
        else
          search --no-floppy --fs-uuid --set=root d9ded76f-31ac-4151-9cf3-054226526613
        fi
        echo    'Loading Linux 4.15.0-23-generic ...'
            linux   /boot/vmlinuz-4.15.0-23-generic root=UUID=d9ded76f-31ac-4151-9cf3-054226526613 ro recovery nomodeset 
        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-4.15.0-23-generic
    }
    menuentry 'GNU/Linux, with Linux 4.15.0-20-generic' --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-20-generic-advanced-d9ded76f-31ac-4151-9cf3-054226526613' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt8'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt8 --hint-efi=hd0,gpt8 --hint-baremetal=ahci0,gpt8  d9ded76f-31ac-4151-9cf3-054226526613
        else
          search --no-floppy --fs-uuid --set=root d9ded76f-31ac-4151-9cf3-054226526613
        fi
        echo    'Loading Linux 4.15.0-20-generic ...'
            linux   /boot/vmlinuz-4.15.0-20-generic root=UUID=d9ded76f-31ac-4151-9cf3-054226526613 ro  quiet splash $vt_handoff
        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-4.15.0-20-generic
    }
    menuentry 'GNU/Linux, with Linux 4.15.0-20-generic (recovery mode)' --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-20-generic-recovery-d9ded76f-31ac-4151-9cf3-054226526613' {
        recordfail
        load_video
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt8'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt8 --hint-efi=hd0,gpt8 --hint-baremetal=ahci0,gpt8  d9ded76f-31ac-4151-9cf3-054226526613
        else
          search --no-floppy --fs-uuid --set=root d9ded76f-31ac-4151-9cf3-054226526613
        fi
        echo    'Loading Linux 4.15.0-20-generic ...'
            linux   /boot/vmlinuz-4.15.0-20-generic root=UUID=d9ded76f-31ac-4151-9cf3-054226526613 ro recovery nomodeset 
        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-4.15.0-20-generic
    }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/25_custom ###

menuentry "Windows UEFI recovery bkpbootmgfw.efi" {
search --fs-uuid --no-floppy --set=root 4672-B8C1
chainloader (${root})/EFI/Microsoft/Boot/bkpbootmgfw.efi
}

menuentry "Windows Boot UEFI recovery" {
search --fs-uuid --no-floppy --set=root 4672-B8C1
chainloader (${root})/EFI/Boot/bkpbootx64.efi
}

menuentry "Windows Boot UEFI recovery fbx64.efi" {
search --fs-uuid --no-floppy --set=root 4672-B8C1
chainloader (${root})/EFI/Boot/fbx64.efi
}

menuentry "EFI/ubuntu/fwupx64.efi" {
search --fs-uuid --no-floppy --set=root 4672-B8C1
chainloader (${root})/EFI/ubuntu/fwupx64.efi
}

menuentry "EFI/ubuntu/mmx64.efi" {
search --fs-uuid --no-floppy --set=root 4672-B8C1
chainloader (${root})/EFI/ubuntu/mmx64.efi
}

menuentry "EFI/ubuntu/MokManager.efi" {
search --fs-uuid --no-floppy --set=root 4672-B8C1
chainloader (${root})/EFI/ubuntu/MokManager.efi
}

menuentry "Windows UEFI recovery bkpbootmgfw.efi sda3" {
search --fs-uuid --no-floppy --set=root 0276-6D05
chainloader (${root})/efi/Microsoft/Boot/bkpbootmgfw.efi
}

menuentry "Windows UEFI recovery sda3" {
search --fs-uuid --no-floppy --set=root 0276-6D05
chainloader (${root})/efi/Microsoft/Boot/LrsBootmgr.efi
}

menuentry "Windows Boot UEFI recovery bkpbootx64.efi" {
search --fs-uuid --no-floppy --set=root 0276-6D05
chainloader (${root})/efi/Boot/bkpbootx64.efi
}
### END /etc/grub.d/25_custom ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows Boot Manager (on /dev/sda2)' --class windows --class os $menuentry_id_option 'osprober-efi-4672-B8C1' {
    insmod part_gpt
    insmod fat
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  4672-B8C1
    else
      search --no-floppy --fs-uuid --set=root 4672-B8C1
    fi
    chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}
set timeout_style=menu
if [ "${timeout}" = 0 ]; then
  set timeout=10
fi
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
menuentry 'System setup' $menuentry_id_option 'uefi-firmware' {
    fwsetup
}
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
--------------------------------------------------------------------------------

=============================== sda8/etc/fstab: ================================

--------------------------------------------------------------------------------
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda8 during installation
UUID=d9ded76f-31ac-4151-9cf3-054226526613 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda2 during installation
#UUID=4672-B8C1  /boot/efi       vfat    umask=0077      0       1
/swapfile                                 none            swap    sw              0       0
UUID=4672-B8C1  /boot/efi   vfat    defaults    0   1
--------------------------------------------------------------------------------

=================== sda8: Location of files loaded by Grub: ====================

           GiB - GB             File                                 Fragment(s)

 768.593757629 = 825.271263232  boot/grub/grub.cfg                             1
 832.889236450 = 894.308007936  boot/grub/i386-pc/core.img                     1
 832.905391693 = 894.325354496  boot/vmlinuz-4.15.0-20-generic                 1
 855.410030365 = 918.489526272  boot/vmlinuz-4.15.0-23-generic                 1
 832.905391693 = 894.325354496  vmlinuz                                        1
 817.080017090 = 877.332987904  boot/initrd.img-4.15.0-20-generic              2
 862.760398865 = 926.381924352  boot/initrd.img-4.15.0-23-generic              2
 817.080017090 = 877.332987904  initrd.img                                     2
 817.080017090 = 877.332987904  initrd.img.old                                 2

======================== Unknown MBRs/Boot Sectors/etc: ========================

Unknown MBR on /dev/sdb

00000000  45 52 08 00 00 00 90 90  00 00 00 00 00 00 00 00  |ER..............|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  33 ed fa 8e d5 bc 00 7c  fb fc 66 31 db 66 31 c9  |3......|..f1.f1.|
00000030  66 53 66 51 06 57 8e dd  8e c5 52 be 00 7c bf 00  |fSfQ.W....R..|..|
00000040  06 b9 00 01 f3 a5 ea 4b  06 00 00 52 b4 41 bb aa  |.......K...R.A..|
00000050  55 31 c9 30 f6 f9 cd 13  72 16 81 fb 55 aa 75 10  |U1.0....r...U.u.|
00000060  83 e1 01 74 0b 66 c7 06  f3 06 b4 42 eb 15 eb 02  |...t.f.....B....|
00000070  31 c9 5a 51 b4 08 cd 13  5b 0f b6 c6 40 50 83 e1  |1.ZQ....[...@P..|
00000080  3f 51 f7 e1 53 52 50 bb  00 7c b9 04 00 66 a1 b0  |?Q..SRP..|...f..|
00000090  07 e8 44 00 0f 82 80 00  66 40 80 c7 02 e2 f2 66  |..D.....f@.....f|
000000a0  81 3e 40 7c fb c0 78 70  75 09 fa bc ec 7b ea 44  |.>@|..xpu....{.D|
000000b0  7c 00 00 e8 83 00 69 73  6f 6c 69 6e 75 78 2e 62  ||.....isolinux.b|
000000c0  69 6e 20 6d 69 73 73 69  6e 67 20 6f 72 20 63 6f  |in missing or co|
000000d0  72 72 75 70 74 2e 0d 0a  66 60 66 31 d2 66 03 06  |rrupt...f`f1.f..|
000000e0  f8 7b 66 13 16 fc 7b 66  52 66 50 06 53 6a 01 6a  |.{f...{fRfP.Sj.j|
000000f0  10 89 e6 66 f7 36 e8 7b  c0 e4 06 88 e1 88 c5 92  |...f.6.{........|
00000100  f6 36 ee 7b 88 c6 08 e1  41 b8 01 02 8a 16 f2 7b  |.6.{....A......{|
00000110  cd 13 8d 64 10 66 61 c3  e8 1e 00 4f 70 65 72 61  |...d.fa....Opera|
00000120  74 69 6e 67 20 73 79 73  74 65 6d 20 6c 6f 61 64  |ting system load|
00000130  20 65 72 72 6f 72 2e 0d  0a 5e ac b4 0e 8a 3e 62  | error...^....>b|
00000140  04 b3 07 cd 10 3c 0a 75  f1 cd 18 f4 eb fd 00 00  |.....<.u........|
00000150  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000160  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000170  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000180  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000190  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001b0  54 59 36 00 00 00 00 00  c7 78 16 72 00 00 80 00  |TY6......x.r....|
000001c0  01 00 00 6f e0 f9 00 00  00 00 00 ac 37 00 00 fe  |...o........7...|
000001d0  ff ff ef fe ff ff ec 82  36 00 40 12 00 00 00 00  |........6.@.....|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa  |..............U.|
00000200

Unknown GPT Partiton Type
e7afbfbf4fa38a449a5b6213eb736c22

/dev/sdb1: unknown GPT attributes
1000000000000001

/dev/sdb2: unknown GPT attributes
1000000000000001
Unknown BootLoader on sdb1

00000000  45 52 08 00 00 00 90 90  00 00 00 00 00 00 00 00  |ER..............|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  33 ed fa 8e d5 bc 00 7c  fb fc 66 31 db 66 31 c9  |3......|..f1.f1.|
00000030  66 53 66 51 06 57 8e dd  8e c5 52 be 00 7c bf 00  |fSfQ.W....R..|..|
00000040  06 b9 00 01 f3 a5 ea 4b  06 00 00 52 b4 41 bb aa  |.......K...R.A..|
00000050  55 31 c9 30 f6 f9 cd 13  72 16 81 fb 55 aa 75 10  |U1.0....r...U.u.|
00000060  83 e1 01 74 0b 66 c7 06  f3 06 b4 42 eb 15 eb 02  |...t.f.....B....|
00000070  31 c9 5a 51 b4 08 cd 13  5b 0f b6 c6 40 50 83 e1  |1.ZQ....[...@P..|
00000080  3f 51 f7 e1 53 52 50 bb  00 7c b9 04 00 66 a1 b0  |?Q..SRP..|...f..|
00000090  07 e8 44 00 0f 82 80 00  66 40 80 c7 02 e2 f2 66  |..D.....f@.....f|
000000a0  81 3e 40 7c fb c0 78 70  75 09 fa bc ec 7b ea 44  |.>@|..xpu....{.D|
000000b0  7c 00 00 e8 83 00 69 73  6f 6c 69 6e 75 78 2e 62  ||.....isolinux.b|
000000c0  69 6e 20 6d 69 73 73 69  6e 67 20 6f 72 20 63 6f  |in missing or co|
000000d0  72 72 75 70 74 2e 0d 0a  66 60 66 31 d2 66 03 06  |rrupt...f`f1.f..|
000000e0  f8 7b 66 13 16 fc 7b 66  52 66 50 06 53 6a 01 6a  |.{f...{fRfP.Sj.j|
000000f0  10 89 e6 66 f7 36 e8 7b  c0 e4 06 88 e1 88 c5 92  |...f.6.{........|
00000100  f6 36 ee 7b 88 c6 08 e1  41 b8 01 02 8a 16 f2 7b  |.6.{....A......{|
00000110  cd 13 8d 64 10 66 61 c3  e8 1e 00 4f 70 65 72 61  |...d.fa....Opera|
00000120  74 69 6e 67 20 73 79 73  74 65 6d 20 6c 6f 61 64  |ting system load|
00000130  20 65 72 72 6f 72 2e 0d  0a 5e ac b4 0e 8a 3e 62  | error...^....>b|
00000140  04 b3 07 cd 10 3c 0a 75  f1 cd 18 f4 eb fd 00 00  |.....<.u........|
00000150  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000001b0  54 59 36 00 00 00 00 00  c7 78 16 72 00 00 80 00  |TY6......x.r....|
000001c0  01 00 00 6f e0 f9 00 00  00 00 00 ac 37 00 00 fe  |...o........7...|
000001d0  ff ff ef fe ff ff ec 82  36 00 40 12 00 00 00 00  |........6.@.....|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa  |..............U.|
00000200

=============================== StdErr Messages: ===============================

File descriptor 9 (/proc/6199/mountinfo) leaked on lvs invocation. Parent PID 24056: bash
File descriptor 63 (pipe:[102333]) leaked on lvs invocation. Parent PID 24056: bash

ADDITIONAL INFORMATION :
=================== log of boot-repair 20180711_1002 ===================
boot-repair version : 4ppa65
boot-sav version : 4ppa65
boot-sav-extra version : 4ppa65
glade2script version : 3.2.3~ppa4
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
Warning: The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes.
boot-repair is executed in live-session (Ubuntu 18.04 LTS, bionic, Ubuntu, x86_64)
CPU op-mode(s):      32-bit, 64-bit
BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity quiet splash ---
ls: cannot access '/home/usr/.config': No such file or directory

=================== os-prober:
/dev/sda2@/efi/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi
/dev/sda8:Ubuntu 18.04 LTS (18.04):Ubuntu:linux

=================== blkid:
/dev/sda1: LABEL="WINRE_DRV" UUID="90A8704FA87035B6" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="1cd4bdfd-fc51-40aa-a2bb-f75c57df982f"
/dev/sda2: LABEL="SYSTEM_DRV" UUID="4672-B8C1" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="04d00287-dc2f-45b2-95ee-8fec8c9ead64"
/dev/sda3: LABEL="LRS_ESP" UUID="0276-6D05" TYPE="vfat" PARTLABEL="Basic data partition" PARTUUID="fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1"
/dev/sda5: LABEL="Windows8_OS" UUID="18FC79B9FC7991AC" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="56fd679e-4c14-4747-9953-1c96632821dc"
/dev/sda6: LABEL="LENOVO" UUID="7824F6A424F66492" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="b990c1c7-a0a2-4acd-9dfe-aa52141d9467"
/dev/sda7: LABEL="PBR_DRV" UUID="848C7DA38C7D9082" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="733a7060-5b6b-4612-8dfa-9fcd23075e3c"
/dev/sda8: UUID="d9ded76f-31ac-4151-9cf3-054226526613" TYPE="ext4" PARTUUID="8be76940-e1e1-426c-8966-74415f692ca2"
/dev/loop0: TYPE="squashfs"
/dev/sdb1: UUID="2018-04-26-18-48-55-00" LABEL="Kubuntu 18.04 LTS amd64" TYPE="iso9660" PTUUID="721678c7" PTTYPE="dos" PARTUUID="721678c7-01"
/dev/sdb2: SEC_TYPE="msdos" UUID="044E-AC17" TYPE="vfat" PARTUUID="721678c7-02"
/dev/sda4: PARTLABEL="Microsoft reserved partition" PARTUUID="a24b40ba-04b3-4d51-b5f0-0a3b8653315b"

1 disks with OS, 2 OS : 1 Linux, 0 MacOS, 1 Windows, 0 unknown type OS.

Windows not detected by os-prober on sda5.
=================== No kernel in /mnt/boot-sav/sda2/boot:
boot.sdi

Presence of EFI/Microsoft file detected: /mnt/boot-sav/sda2/EFI/Microsoft/Boot/bootmgfw.efi
Presence of EFI/Boot file detected: /mnt/boot-sav/sda2/EFI/Boot/bkpbootx64.efi
Presence of EFI/Boot file detected: /mnt/boot-sav/sda2/EFI/Boot/bootx64.efi
Presence of EFI/Boot file detected: /mnt/boot-sav/sda2/EFI/Boot/fbx64.efi
Presence of bkp file detected: /mnt/boot-sav/sda2/EFI/Boot/bkpbootx64.efi
Presence of EFI/Microsoft file detected: /mnt/boot-sav/sda3/EFI/Microsoft/Boot/bootmgfw.efi
Presence of EFI/Microsoft file detected: /mnt/boot-sav/sda3/EFI/Microsoft/Boot/LrsBootmgr.efi
Presence of EFI/Boot file detected: /mnt/boot-sav/sda3/EFI/Boot/bkpbootx64.efi
Presence of EFI/Boot file detected: /mnt/boot-sav/sda3/EFI/Boot/bootx64.efi
Presence of bkp file detected: /mnt/boot-sav/sda3/EFI/Boot/bkpbootx64.efi
Presence of EFI/Boot file detected: /mnt/boot-sav/sda7/efi/Boot/bootx64.efi

=================== /mnt/etc/grub.d/ :
drwxr-xr-x  2 root root     4096 lug 11 09:11 grub.d
total 84
-rwxr-xr-x 1 root root  9783 mar  4 13:11 00_header
-rwxr-xr-x 1 root root  6258 mar  4 13:11 05_debian_theme
-rwxr-xr-x 1 root root 12693 mar  4 13:11 10_linux
-rwxr-xr-x 1 root root 11298 mar  4 13:11 20_linux_xen
-rwxr-xr-x 1 root root  1992 gen 28  2016 20_memtest86+
-rwxr-xr-x 1 root root  1343 lug 11 09:11 25_custom
-rwxr-xr-x 1 root root 12059 mar  4 13:11 30_os-prober
-rwxr-xr-x 1 root root  1418 mar  4 13:11 30_uefi-firmware
-rwxr-xr-x 1 root root   214 mar  4 13:11 40_custom
-rwxr-xr-x 1 root root   216 mar  4 13:11 41_custom
-rw-r--r-- 1 root root   483 mar  4 13:11 README

=================== /mnt/etc/default/grub :

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

GRUB_CMDLINE_LINUX=""

/boot/efi detected in the fstab of sda8: UUID=4672-B8C1  (sda2)
/usr/share/boot-sav/bs-cmd_terminal.sh: line 179: warning: command substitution: ignored null byte in input

=================== efibootmgr -v
BootCurrent: 0006
Timeout: 0 seconds
BootOrder: 0000,0002,0003,0001,0005,2001,0004,2002,2003
Boot0000* grub  HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIgrubshimx64.efi)
Boot0001* Windows Boot Manager  HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIMicrosoftBootbootmgfw.efi)RC
Boot0002* ubuntu    HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIubuntushimx64.efi)
Boot0003* Windows Boot Manager  HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIMicrosoftBootbootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}....................
Boot0004* Lenovo Recovery System    HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIMicrosoftBootLrsBootMgr.efi)RC
Boot0005* ubuntu    HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIubuntushimx64.efi)RC
Boot0006* EFI USB Device (USB Flash Memory) PciRoot(0x0)/Pci(0x14,0x0)/USB(9,0)/HD(1,MBR,0x721678c7,0x3682ec,0x1240)RC
Boot2001* EFI USB Device    RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network   RC

=================== UEFI/Legacy mode:
BIOS is EFI-compatible, and is setup in EFI-mode for this live-session.
SecureBoot disabled. (maybe sec-boot, Per cortesia, invia un messaggio a boot.repair@gmail.com)

=================== PARTITIONS & DISKS:
sda1    : sda,  not-sepboot,    no-grubenv  nogrub, no-docgrub, no-update-grub, 32, no-boot,    no-os,  not--efi--part, part-has-no-fstab,  part-has-no-fstab,  no-nt,  no-winload, recovery-or-hidden, no-bmgr,    notwinboot, nopakmgr,   nogrubinstall,  no---usr,   part-has-no-fstab,  not-sep-usr,    standard,   not-far,    notbiosboot, /mnt/boot-sav/sda1.
sda2    : sda,  not-sepboot,    no-grubenv  nogrub, no-docgrub, no-update-grub, 32, no-kernel,  is-os,  is-correct-EFI, part-has-no-fstab,  part-has-no-fstab,  no-nt,  no-winload, recovery-or-hidden, no-bmgr,    notwinboot, nopakmgr,   nogrubinstall,  no---usr,   part-has-no-fstab,  not-sep-usr,    standard,   not-far,    notbiosboot, /mnt/boot-sav/sda2.
sda3    : sda,  not-sepboot,    no-grubenv  nogrub, no-docgrub, no-update-grub, 32, no-boot,    no-os,  is-maybe-EFI,   part-has-no-fstab,  part-has-no-fstab,  no-nt,  no-winload, recovery-or-hidden, bootmgr,    is-winboot, nopakmgr,   nogrubinstall,  no---usr,   part-has-no-fstab,  not-sep-usr,    standard,   not-far,    notbiosboot, /mnt/boot-sav/sda3.
sda5    : sda,  not-sepboot,    no-grubenv  nogrub, no-docgrub, no-update-grub, 32, no-boot,    is-os,  not--efi--part, part-has-no-fstab,  part-has-no-fstab,  no-nt,  haswinload, no-recov-nor-hid,   bootmgr,    is-winboot, nopakmgr,   nogrubinstall,  no---usr,   part-has-no-fstab,  not-sep-usr,    standard,   farbios,    notbiosboot, /mnt/boot-sav/sda5.
sda6    : sda,  not-sepboot,    no-grubenv  nogrub, no-docgrub, no-update-grub, 32, no-boot,    no-os,  not--efi--part, part-has-no-fstab,  part-has-no-fstab,  no-nt,  no-winload, no-recov-nor-hid,   no-bmgr,    notwinboot, nopakmgr,   nogrubinstall,  no---usr,   part-has-no-fstab,  not-sep-usr,    standard,   farbios,    notbiosboot, /mnt/boot-sav/sda6.
sda7    : sda,  not-sepboot,    no-grubenv  nogrub, no-docgrub, no-update-grub, 32, no-boot,    no-os,  is-maybe-EFI,   part-has-no-fstab,  part-has-no-fstab,  no-nt,  no-winload, recovery-or-hidden, no-bmgr,    notwinboot, nopakmgr,   nogrubinstall,  no---usr,   part-has-no-fstab,  not-sep-usr,    standard,   farbios,    notbiosboot, /mnt/boot-sav/sda7.
sda8    : sda,  not-sepboot,    grubenv-ok  grub2,  signed grub-efi ,   update-grub,    64, with-boot,  is-os,  not--efi--part, fstab-without-boot, fstab-has-goodEFI,  no-nt,  no-winload, no-recov-nor-hid,   no-bmgr,    notwinboot, apt-get,    grub-install,   with--usr,  fstab-without-usr,  not-sep-usr,    standard,   farbios,    notbiosboot, /mnt.

sda : GPT,  no-BIOS_boot,   has-correctEFI,     not-usb,    not-mmc, has-os,    2048 sectors * 512 bytes

=================== parted -lm:

BYT;
/dev/sda:1000GB:scsi:512:4096:gpt:ATA WDC WD10JPCX-24U:;
1:1049kB:1050MB:1049MB:ntfs:Basic data partition:hidden, diag;
2:1050MB:1322MB:273MB:fat32:EFI system partition:boot, hidden, esp;
3:1322MB:2371MB:1049MB:fat32:Basic data partition:hidden;
4:2371MB:2505MB:134MB::Microsoft reserved partition:msftres;
5:2505MB:825GB:823GB:ntfs:Basic data partition:msftdata;
8:825GB:959GB:134GB:ext4::;
6:959GB:986GB:26.8GB:ntfs:Basic data partition:msftdata;
7:986GB:1000GB:13.9GB:ntfs:Basic data partition:hidden, diag;

BYT;
/dev/sdb:4008MB:scsi:512:512:unknown: USB Flash Memory:;

=================== lsblk:
KNAME TYPE FSTYPE     SIZE LABEL
loop0 loop squashfs   1,7G
sda   disk          931,5G
sda1  part ntfs      1000M WINRE_DRV
sda2  part vfat       260M SYSTEM_DRV
sda3  part vfat      1000M LRS_ESP
sda4  part            128M
sda5  part ntfs     766,3G Windows8_OS
sda6  part ntfs        25G LENOVO
sda7  part ntfs      12,9G PBR_DRV
sda8  part ext4       125G
sdb   disk iso9660    3,8G Kubuntu 18.04 LTS amd64
sdb1  part iso9660    1,8G Kubuntu 18.04 LTS amd64
sdb2  part vfat       2,3M Kubuntu 18.04 LTS amd64
sr0   rom            1024M

KNAME ROTA RO RM STATE   MOUNTPOINT
loop0    1  1  0         /rofs
sda      1  0  0 running
sda1     1  0  0         /mnt/boot-sav/sda1
sda2     1  0  0         /mnt/boot-sav/sda2
sda3     1  0  0         /mnt/boot-sav/sda3
sda4     1  0  0
sda5     1  0  0         /mnt/boot-sav/sda5
sda6     1  0  0         /mnt/boot-sav/sda6
sda7     1  0  0         /mnt/boot-sav/sda7
sda8     1  0  0         /mnt
sdb      1  0  1 running /cdrom
sdb1     1  0  1
sdb2     1  0  1
sr0      1  0  1 running

=================== mount:
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=4017504k,nr_inodes=1004376,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=807740k,mode=755)
/dev/sdb on /cdrom type iso9660 (ro,noatime,nojoliet,check=s,map=n,blocksize=2048)
/dev/loop0 on /rofs type squashfs (ro,noatime)
/cow on / type overlay (rw,relatime,lowerdir=//filesystem.squashfs,upperdir=/cow/upper,workdir=/cow/work)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,nosuid,nodev,noexec,relatime,rdma)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=34,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=14798)
mqueue on /dev/mqueue type mqueue (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
tracefs on /sys/kernel/debug/tracing type tracefs (rw,relatime)
configfs on /sys/kernel/config type configfs (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime)
tmpfs on /run/user/999 type tmpfs (rw,nosuid,nodev,relatime,size=807736k,mode=700,uid=999,gid=999)
/dev/sda8 on /mnt type ext4 (rw,relatime,data=ordered)
/dev/sda1 on /mnt/boot-sav/sda1 type fuseblk (rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
/dev/sda2 on /mnt/boot-sav/sda2 type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/sda3 on /mnt/boot-sav/sda3 type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/sda5 on /mnt/boot-sav/sda5 type fuseblk (rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
/dev/sda6 on /mnt/boot-sav/sda6 type fuseblk (rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
/dev/sda7 on /mnt/boot-sav/sda7 type fuseblk (rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096)

=================== ls:
/sys/block/sda (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range hidden holders inflight integrity power queue range removable ro sda1 sda2 sda3 sda4 sda5 sda6 sda7 sda8 size slaves stat subsystem trace uevent
/sys/block/sdb (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range hidden holders inflight integrity power queue range removable ro sdb1 sdb2 size slaves stat subsystem trace uevent
/sys/block/sr0 (filtered):  alignment_offset bdi capability dev device discard_alignment events events_async events_poll_msecs ext_range hidden holders inflight integrity power queue range removable ro size slaves stat subsystem trace uevent
/dev (filtered):  autofs block bsg btrfs-control bus cdrom cdrw char console core cpu cpu_dma_latency cuse disk dri drm_dp_aux0 dvd dvdrw ecryptfs fb0 fd full fuse hpet hugepages hwrng i2c-0 i2c-1 i2c-10 i2c-11 i2c-12 i2c-13 i2c-14 i2c-15 i2c-16 i2c-17 i2c-18 i2c-2 i2c-3 i2c-4 i2c-5 i2c-6 i2c-7 i2c-8 i2c-9 initctl input kmsg lightnvm log mapper mcelog media0 mei0 mem memory_bandwidth mqueue net network_latency network_throughput null port ppp psaux ptmx pts random rfkill rtc rtc0 sda sda1 sda2 sda3 sda4 sda5 sda6 sda7 sda8 sdb sdb1 sdb2 sg0 sg1 sg2 shm snapshot snd sr0 stderr stdin stdout uhid uinput urandom userio v4l vfio vga_arbiter vhci vhost-net vhost-vsock video0 zero
ls /dev/mapper:  control

=================== hexdump -n512 -C /dev/sda1
00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|
00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 08 00 00  |........?.......|
00000020  00 00 00 00 80 00 80 00  ff 3f 1f 00 00 00 00 00  |.........?......|
00000030  55 4d 01 00 00 00 00 00  02 00 00 00 00 00 00 00  |UM..............|
00000040  f6 00 00 00 01 00 00 00  b6 35 70 a8 4f 70 a8 90  |.........5p.Op..|
00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|
00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|
00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|
00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|
00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|
000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|
000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|
000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|
000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|
000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|
000000f0  68 07 bb 16 68 52 11 16  68 09 00 66 53 66 53 66  |h...hR..h..fSfSf|
00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|
00000110  0a 13 b9 f6 0c fc f3 aa  e9 fe 01 90 90 66 60 1e  |.............f`.|
00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|
00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|
00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|
00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|
00000160  0e 16 00 75 bc 07 1f 66  61 c3 a1 f6 01 e8 09 00  |...u...fa.......|
00000170  a1 fa 01 e8 03 00 f4 eb  fd 8b f0 ac 3c 00 74 09  |............<.t.|
00000180  b4 0e bb 07 00 cd 10 eb  f2 c3 0d 0a 41 20 64 69  |............A di|
00000190  73 6b 20 72 65 61 64 20  65 72 72 6f 72 20 6f 63  |sk read error oc|
000001a0  63 75 72 72 65 64 00 0d  0a 42 4f 4f 54 4d 47 52  |curred...BOOTMGR|
000001b0  20 69 73 20 63 6f 6d 70  72 65 73 73 65 64 00 0d  | is compressed..|
000001c0  0a 50 72 65 73 73 20 43  74 72 6c 2b 41 6c 74 2b  |.Press Ctrl+Alt+|
000001d0  44 65 6c 20 74 6f 20 72  65 73 74 61 72 74 0d 0a  |Del to restart..|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 8a 01  a7 01 bf 01 00 00 55 aa  |..............U.|
00000200

=================== hexdump -n512 -C /dev/sda2
00000000  eb 58 90 4d 53 44 4f 53  35 2e 30 00 02 08 fe 1b  |.X.MSDOS5.0.....|
00000010  02 00 00 00 00 f8 00 00  3f 00 ff 00 00 48 1f 00  |........?....H..|
00000020  00 20 08 00 01 02 00 00  00 00 00 00 02 00 00 00  |. ..............|
00000030  01 00 06 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  80 01 29 c1 b8 72 46 4e  4f 20 4e 41 4d 45 20 20  |..)..rFNO NAME  |
00000050  20 20 46 41 54 33 32 20  20 20 33 c9 8e d1 bc f4  |  FAT32   3.....|
00000060  7b 8e c1 8e d9 bd 00 7c  88 56 40 88 4e 02 8a 56  |{......|.V@.N..V|
00000070  40 b4 41 bb aa 55 cd 13  72 10 81 fb 55 aa 75 0a  |@.A..U..r...U.u.|
00000080  f6 c1 01 74 05 fe 46 02  eb 2d 8a 56 40 b4 08 cd  |...t..F..-.V@...|
00000090  13 73 05 b9 ff ff 8a f1  66 0f b6 c6 40 66 0f b6  |.s......f...@f..|
000000a0  d1 80 e2 3f f7 e2 86 cd  c0 ed 06 41 66 0f b7 c9  |...?.......Af...|
000000b0  66 f7 e1 66 89 46 f8 83  7e 16 00 75 39 83 7e 2a  |f..f.F..~..u9.~*|
000000c0  00 77 33 66 8b 46 1c 66  83 c0 0c bb 00 80 b9 01  |.w3f.F.f........|
000000d0  00 e8 2c 00 e9 a8 03 a1  f8 7d 80 c4 7c 8b f0 ac  |..,......}..|...|
000000e0  84 c0 74 17 3c ff 74 09  b4 0e bb 07 00 cd 10 eb  |..t.<.t.........|
000000f0  ee a1 fa 7d eb e4 a1 7d  80 eb df 98 cd 16 cd 19  |...}...}........|
00000100  66 60 80 7e 02 00 0f 84  20 00 66 6a 00 66 50 06  |f`.~.... .fj.fP.|
00000110  53 66 68 10 00 01 00 b4  42 8a 56 40 8b f4 cd 13  |Sfh.....B.V@....|
00000120  66 58 66 58 66 58 66 58  eb 33 66 3b 46 f8 72 03  |fXfXfXfX.3f;F.r.|
00000130  f9 eb 2a 66 33 d2 66 0f  b7 4e 18 66 f7 f1 fe c2  |..*f3.f..N.f....|
00000140  8a ca 66 8b d0 66 c1 ea  10 f7 76 1a 86 d6 8a 56  |..f..f....v....V|
00000150  40 8a e8 c0 e4 06 0a cc  b8 01 02 cd 13 66 61 0f  |@............fa.|
00000160  82 74 ff 81 c3 00 02 66  40 49 75 94 c3 42 4f 4f  |.t.....f@Iu..BOO|
00000170  54 4d 47 52 20 20 20 20  00 00 00 00 00 00 00 00  |TMGR    ........|
00000180  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000001a0  00 00 00 00 00 00 00 00  00 00 00 00 0d 0a 44 69  |..............Di|
000001b0  73 6b 20 65 72 72 6f 72  ff 0d 0a 50 72 65 73 73  |sk error...Press|
000001c0  20 61 6e 79 20 6b 65 79  20 74 6f 20 72 65 73 74  | any key to rest|
000001d0  61 72 74 0d 0a 00 00 00  00 00 00 00 00 00 00 00  |art.............|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 00 00  ac 01 b9 01 00 00 55 aa  |..............U.|
00000200
efi files in sda3/efi: /Microsoft/Boot/memtest.efi /Microsoft/Boot/LrsBootmgr.efi /Microsoft/Boot/bootmgr.efi /Microsoft/Boot/bootmgfw.efi /ubuntu/shimx64.efi /Boot/bootx64.efi /Boot/bkpbootx64.efi

=================== hexdump -n512 -C /dev/sda3
00000000  eb 58 90 4d 53 44 4f 53  35 2e 30 00 02 08 6e 10  |.X.MSDOS5.0...n.|
00000010  02 00 00 00 00 f8 00 00  3f 00 ff 00 00 68 27 00  |........?....h'.|
00000020  00 40 1f 00 c9 07 00 00  00 00 00 00 02 00 00 00  |.@..............|
00000030  01 00 06 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  80 01 29 05 6d 76 02 4e  4f 20 4e 41 4d 45 20 20  |..).mv.NO NAME  |
00000050  20 20 46 41 54 33 32 20  20 20 33 c9 8e d1 bc f4  |  FAT32   3.....|
00000060  7b 8e c1 8e d9 bd 00 7c  88 56 40 88 4e 02 8a 56  |{......|.V@.N..V|
00000070  40 b4 41 bb aa 55 cd 13  72 10 81 fb 55 aa 75 0a  |@.A..U..r...U.u.|
00000080  f6 c1 01 74 05 fe 46 02  eb 2d 8a 56 40 b4 08 cd  |...t..F..-.V@...|
00000090  13 73 05 b9 ff ff 8a f1  66 0f b6 c6 40 66 0f b6  |.s......f...@f..|
000000a0  d1 80 e2 3f f7 e2 86 cd  c0 ed 06 41 66 0f b7 c9  |...?.......Af...|
000000b0  66 f7 e1 66 89 46 f8 83  7e 16 00 75 39 83 7e 2a  |f..f.F..~..u9.~*|
000000c0  00 77 33 66 8b 46 1c 66  83 c0 0c bb 00 80 b9 01  |.w3f.F.f........|
000000d0  00 e8 2c 00 e9 a8 03 a1  f8 7d 80 c4 7c 8b f0 ac  |..,......}..|...|
000000e0  84 c0 74 17 3c ff 74 09  b4 0e bb 07 00 cd 10 eb  |..t.<.t.........|
000000f0  ee a1 fa 7d eb e4 a1 7d  80 eb df 98 cd 16 cd 19  |...}...}........|
00000100  66 60 80 7e 02 00 0f 84  20 00 66 6a 00 66 50 06  |f`.~.... .fj.fP.|
00000110  53 66 68 10 00 01 00 b4  42 8a 56 40 8b f4 cd 13  |Sfh.....B.V@....|
00000120  66 58 66 58 66 58 66 58  eb 33 66 3b 46 f8 72 03  |fXfXfXfX.3f;F.r.|
00000130  f9 eb 2a 66 33 d2 66 0f  b7 4e 18 66 f7 f1 fe c2  |..*f3.f..N.f....|
00000140  8a ca 66 8b d0 66 c1 ea  10 f7 76 1a 86 d6 8a 56  |..f..f....v....V|
00000150  40 8a e8 c0 e4 06 0a cc  b8 01 02 cd 13 66 61 0f  |@............fa.|
00000160  82 74 ff 81 c3 00 02 66  40 49 75 94 c3 42 4f 4f  |.t.....f@Iu..BOO|
00000170  54 4d 47 52 20 20 20 20  00 00 00 00 00 00 00 00  |TMGR    ........|
00000180  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000001a0  00 00 00 00 00 00 00 00  00 00 00 00 0d 0a 44 69  |..............Di|
000001b0  73 6b 20 65 72 72 6f 72  ff 0d 0a 50 72 65 73 73  |sk error...Press|
000001c0  20 61 6e 79 20 6b 65 79  20 74 6f 20 72 65 73 74  | any key to rest|
000001d0  61 72 74 0d 0a 00 00 00  00 00 00 00 00 00 00 00  |art.............|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 00 00  ac 01 b9 01 00 00 55 aa  |..............U.|
00000200

=================== hexdump -n512 -C /dev/sda5
00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|
00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 a8 4a 00  |........?.....J.|
00000020  00 00 00 00 80 00 80 00  ff 57 c8 5f 00 00 00 00  |.........W._....|
00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|
00000040  f6 00 00 00 01 00 00 00  ac 91 79 fc b9 79 fc 18  |..........y..y..|
00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|
00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|
00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|
00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|
00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|
000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|
000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|
000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|
000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|
000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|
000000f0  68 07 bb 16 68 52 11 16  68 09 00 66 53 66 53 66  |h...hR..h..fSfSf|
00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|
00000110  0a 13 b9 f6 0c fc f3 aa  e9 fe 01 90 90 66 60 1e  |.............f`.|
00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|
00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|
00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|
00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|
00000160  0e 16 00 75 bc 07 1f 66  61 c3 a1 f6 01 e8 09 00  |...u...fa.......|
00000170  a1 fa 01 e8 03 00 f4 eb  fd 8b f0 ac 3c 00 74 09  |............<.t.|
00000180  b4 0e bb 07 00 cd 10 eb  f2 c3 0d 0a 41 20 64 69  |............A di|
00000190  73 6b 20 72 65 61 64 20  65 72 72 6f 72 20 6f 63  |sk read error oc|
000001a0  63 75 72 72 65 64 00 0d  0a 42 4f 4f 54 4d 47 52  |curred...BOOTMGR|
000001b0  20 69 73 20 63 6f 6d 70  72 65 73 73 65 64 00 0d  | is compressed..|
000001c0  0a 50 72 65 73 73 20 43  74 72 6c 2b 41 6c 74 2b  |.Press Ctrl+Alt+|
000001d0  44 65 6c 20 74 6f 20 72  65 73 74 61 72 74 0d 0a  |Del to restart..|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 8a 01  a7 01 bf 01 00 00 55 aa  |..............U.|
00000200

=================== hexdump -n512 -C /dev/sda6
00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|
00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 08 b3 6f  |........?......o|
00000020  00 00 00 00 80 00 80 00  ff ff 1f 03 00 00 00 00  |................|
00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|
00000040  f6 00 00 00 01 00 00 00  92 64 f6 24 a4 f6 24 78  |.........d.$..$x|
00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|
00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|
00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|
00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|
00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|
000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|
000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|
000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|
000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|
000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|
000000f0  68 07 bb 16 68 52 11 16  68 09 00 66 53 66 53 66  |h...hR..h..fSfSf|
00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|
00000110  0a 13 b9 f6 0c fc f3 aa  e9 fe 01 90 90 66 60 1e  |.............f`.|
00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|
00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|
00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|
00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|
00000160  0e 16 00 75 bc 07 1f 66  61 c3 a1 f6 01 e8 09 00  |...u...fa.......|
00000170  a1 fa 01 e8 03 00 f4 eb  fd 8b f0 ac 3c 00 74 09  |............<.t.|
00000180  b4 0e bb 07 00 cd 10 eb  f2 c3 0d 0a 41 20 64 69  |............A di|
00000190  73 6b 20 72 65 61 64 20  65 72 72 6f 72 20 6f 63  |sk read error oc|
000001a0  63 75 72 72 65 64 00 0d  0a 42 4f 4f 54 4d 47 52  |curred...BOOTMGR|
000001b0  20 69 73 20 63 6f 6d 70  72 65 73 73 65 64 00 0d  | is compressed..|
000001c0  0a 50 72 65 73 73 20 43  74 72 6c 2b 41 6c 74 2b  |.Press Ctrl+Alt+|
000001d0  44 65 6c 20 74 6f 20 72  65 73 74 61 72 74 0d 0a  |Del to restart..|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 8a 01  a7 01 bf 01 00 00 55 aa  |..............U.|
00000200

=================== hexdump -n512 -C /dev/sda7
00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|
00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 08 d3 72  |........?......r|
00000020  00 00 00 00 80 00 80 00  ff 5f 9d 01 00 00 00 00  |........._......|
00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|
00000040  f6 00 00 00 01 00 00 00  82 90 7d 8c a3 7d 8c 84  |..........}..}..|
00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|
00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|
00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|
00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|
00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|
000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|
000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|
000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|
000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|
000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|
000000f0  68 07 bb 16 68 52 11 16  68 09 00 66 53 66 53 66  |h...hR..h..fSfSf|
00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|
00000110  0a 13 b9 f6 0c fc f3 aa  e9 fe 01 90 90 66 60 1e  |.............f`.|
00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|
00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|
00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|
00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|
00000160  0e 16 00 75 bc 07 1f 66  61 c3 a1 f6 01 e8 09 00  |...u...fa.......|
00000170  a1 fa 01 e8 03 00 f4 eb  fd 8b f0 ac 3c 00 74 09  |............<.t.|
00000180  b4 0e bb 07 00 cd 10 eb  f2 c3 0d 0a 41 20 64 69  |............A di|
00000190  73 6b 20 72 65 61 64 20  65 72 72 6f 72 20 6f 63  |sk read error oc|
000001a0  63 75 72 72 65 64 00 0d  0a 42 4f 4f 54 4d 47 52  |curred...BOOTMGR|
000001b0  20 69 73 20 63 6f 6d 70  72 65 73 73 65 64 00 0d  | is compressed..|
000001c0  0a 50 72 65 73 73 20 43  74 72 6c 2b 41 6c 74 2b  |.Press Ctrl+Alt+|
000001d0  44 65 6c 20 74 6f 20 72  65 73 74 61 72 74 0d 0a  |Del to restart..|
000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001f0  00 00 00 00 00 00 8a 01  a7 01 bf 01 00 00 55 aa  |..............U.|
00000200

=================== df -Th:

Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs  3.9G     0  3.9G   0% /dev
tmpfs          tmpfs     789M  1.4M  788M   1% /run
/dev/sdb       iso9660   1.8G  1.8G     0 100% /cdrom
/dev/loop0     squashfs  1.7G  1.7G     0 100% /rofs
/cow           overlay   3.9G  491M  3.4G  13% /
tmpfs          tmpfs     3.9G   52M  3.9G   2% /dev/shm
tmpfs          tmpfs     5.0M  8.0K  5.0M   1% /run/lock
tmpfs          tmpfs     3.9G     0  3.9G   0% /sys/fs/cgroup
tmpfs          tmpfs     3.9G  528K  3.9G   1% /tmp
tmpfs          tmpfs     789M   20K  789M   1% /run/user/999
/dev/sda8      ext4      123G  9.1G  108G   8% /mnt
/dev/sda1      fuseblk  1000M  349M  652M  35% /mnt/boot-sav/sda1
/dev/sda2      vfat      256M   40M  217M  16% /mnt/boot-sav/sda2
/dev/sda3      vfat      996M  512M  485M  52% /mnt/boot-sav/sda3
/dev/sda5      fuseblk   767G  104G  663G  14% /mnt/boot-sav/sda5
/dev/sda6      fuseblk    25G  9.5G   16G  38% /mnt/boot-sav/sda6
/dev/sda7      fuseblk    13G   11G  2.8G  79% /mnt/boot-sav/sda7

=================== fdisk -l:
Disk /dev/loop0: 1.7 GiB, 1777819648 bytes, 3472304 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 4DF3ACFC-32F8-41B3-85E0-1B564BC2FEE6

Device          Start        End    Sectors   Size Type
/dev/sda1        2048    2050047    2048000  1000M Windows recovery environment
/dev/sda2     2050048    2582527     532480   260M EFI System
/dev/sda3     2582528    4630527    2048000  1000M Lenovo boot partition
/dev/sda4     4630528    4892671     262144   128M Microsoft reserved
/dev/sda5     4892672 1611857919 1606965248 766.3G Microsoft basic data
/dev/sda6  1874003968 1926432767   52428800    25G Microsoft basic data
/dev/sda7  1926432768 1953523711   27090944  12.9G Windows recovery environment
/dev/sda8  1611857920 1874003967  262146048   125G Linux filesystem

Partition table entries are not in disk order.

Disk /dev/sdb: 3.8 GiB, 4007657472 bytes, 7827456 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x721678c7

Device     Boot   Start     End Sectors  Size Id Type
/dev/sdb1  *          0 3648511 3648512  1.8G  0 Empty
/dev/sdb2       3572460 3577131    4672  2.3M ef EFI (FAT-12/16/32)

=================== Default settings of Boot Repair
The default repair of the Boot-Repair utility would reinstall the grub-efi-amd64-signed of sda8, using the following options:        sda2/boot/efi,
Additional repair would be performed: unhide-bootmenu-10s    use-standard-efi-file  restore-efi-backups

=================== Final advice in case of suggested repair
Non dimenticare di impostare la priorità di avvio nel BIOS al file sda2/efi/.../grub*.efi!

Se il tuo computer si riavvia automaticamente in Windows, prova a cambiare l'ordine dei dischi di avvio nel tuo BIOS.
Se il vostro BIOS  non consente di cambiare l'ordine di avvio , modificare la voce di avvio predefinita del bootloader di Windows.
Per esempio puoi avviare windows, quindi digitare il seguente comando in un prompt dei comandi con privilegi amministrativi:
bcdedit /set {bootmgr} path \EFI\...\grub*.efi

=================== User settings
The settings chosen by the user will reinstall the grub-efi-amd64-signed of sda8, using the following options:        sda2/boot/efi,
Additional repair will be performed: unhide-bootmenu-10s    use-standard-efi-file rename-ms-efi restore-efi-backups

rm /mnt/boot-sav/sda2/efi/Boot/bootx64.efi
rm /mnt/boot-sav/sda3/efi/Boot/bootx64.efi
rm /mnt/boot-sav/sda7/efi/Boot/bootx64.efi /mnt/boot-sav/sda7/efi/Boot/bootx64.efi.grb
Mount sda2 on /mnt/boot/efi
efi files in sda2/efi: /Microsoft/Boot/memtest.efi /Microsoft/Boot/bootmgr.efi /Microsoft/Boot/bootmgfw.efi /ubuntu/shimx64.efi /ubuntu/MokManager.efi /ubuntu/mmx64.efi /ubuntu/grubx64.efi /ubuntu/fwupx64.efi /grub/shimx64.efi /grub/MokManager.efi /grub/mmx64.efi /grub/grubx64.efi /Boot/fbx64.efi /Boot/bootx64.efi

*******lspci -nnk | grep -iA3 vga
00:02.0 VGA compatible controller [0300]: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06)
Subsystem: Lenovo 4th Gen Core Processor Integrated Graphics Controller [17aa:380a]
Kernel driver in use: i915
Kernel modules: i915
*******

grub-install --version
grub-install (GRUB) 2.02-2ubuntu8.1,grub-install (GRUB) 2.

chroot /mnt efibootmgr -v
BootCurrent: 0006
Timeout: 0 seconds
BootOrder: 0000,0002,0003,0001,0005,2001,0004,2002,2003
Boot0000* grub  HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIgrubshimx64.efi)
Boot0001* Windows Boot Manager  HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIMicrosoftBootbootmgfw.efi)RC
Boot0002* ubuntu    HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIubuntushimx64.efi)
Boot0003* Windows Boot Manager  HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIMicrosoftBootbootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}....................
Boot0004* Lenovo Recovery System    HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIMicrosoftBootLrsBootMgr.efi)RC
Boot0005* ubuntu    HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIubuntushimx64.efi)RC
Boot0006* EFI USB Device (USB Flash Memory) PciRoot(0x0)/Pci(0x14,0x0)/USB(9,0)/HD(1,MBR,0x721678c7,0x3682ec,0x1240)RC
Boot2001* EFI USB Device    RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network   RC

chroot /mnt uname -r
Kernel: 4.15.0-20-generic

Reinstall the grub-efi-amd64-signed of sda8
Installing for x86_64-efi platform.
Installation finished. No error reported.
grub-install --efi-directory=/boot/efi --target=x86_64-efi --uefi-secure-boot : exit code of grub-install :0
mv 25_custom
efi files in sda2/efi: /Microsoft/Boot/memtest.efi /Microsoft/Boot/bootmgr.efi /Microsoft/Boot/bootmgfw.efi /ubuntu/shimx64.efi /ubuntu/MokManager.efi /ubuntu/mmx64.efi /ubuntu/grubx64.efi /ubuntu/fwupx64.efi /grub/shimx64.efi /grub/MokManager.efi /grub/mmx64.efi /grub/grubx64.efi /Boot/fbx64.efi /Boot/bootx64.efi
efi files in sda3/efi: /Microsoft/Boot/memtest.efi /Microsoft/Boot/LrsBootmgr.efi /Microsoft/Boot/bootmgr.efi /Microsoft/Boot/bootmgfw.efi /ubuntu/shimx64.efi /Boot/bootx64.efi
efi files in sda7/efi: /ubuntu/shimx64.efi
df /dev/sda2
Save and rename /mnt/boot/efi/EFI/Microsoft/Boot/bootmgfw.efi (/mnt/boot/efi/EFI/Microsoft/Boot/bkpbootmgfw.efi)
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot/efi/EFI/Microsoft/Boot/bootmgfw.efi
df /dev/sda2
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot/efi/EFI/Microsoft/Boot/bootx64.efi (& .grb)
df /dev/sda2
Save and rename /mnt/boot/efi/EFI/Boot/bootx64.efi (/mnt/boot/efi/EFI/Boot/bkpbootx64.efi)
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot/efi/EFI/Boot/bootx64.efi
efi files in sda2/efi: /Microsoft/Boot/memtest.efi /Microsoft/Boot/bootx64.efi /Microsoft/Boot/bootmgr.efi /Microsoft/Boot/bootmgfw.efi /Microsoft/Boot/bkpbootmgfw.efi /ubuntu/shimx64.efi /ubuntu/MokManager.efi /ubuntu/mmx64.efi /ubuntu/grubx64.efi /ubuntu/fwupx64.efi /grub/shimx64.efi /grub/MokManager.efi /grub/mmx64.efi /grub/grubx64.efi /Boot/fbx64.efi /Boot/bootx64.efi /Boot/bkpbootx64.efi
Add /mnt/boot/efi efi entries in /mnt/etc/grub.d/25_custom
Adding custom /mnt/boot/efi/EFI/Microsoft/Boot/bkpbootmgfw.efi
Adding custom /mnt/boot/efi/EFI/Boot/bkpbootx64.efi
Adding custom /mnt/boot/efi/EFI/Boot/fbx64.efi
sda2/bkpbootx64.efi already added
sda2/bkpbootmgfw.efi already added
sda2/fbx64.efi already added
Adding custom /mnt/boot/efi/EFI/ubuntu/fwupx64.efi
Adding custom /mnt/boot/efi/EFI/ubuntu/mmx64.efi
Adding custom /mnt/boot/efi/EFI/ubuntu/MokManager.efi
df /dev/sda3
Save and rename /mnt/boot-sav/sda3/efi/Microsoft/Boot/bootmgfw.efi (/mnt/boot-sav/sda3/efi/Microsoft/Boot/bkpbootmgfw.efi)
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot-sav/sda3/efi/Microsoft/Boot/bootmgfw.efi
df /dev/sda3
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot-sav/sda3/efi/Microsoft/Boot/bootx64.efi (& .grb)
df /dev/sda3
Save and rename /mnt/boot-sav/sda3/efi/Boot/bootx64.efi (/mnt/boot-sav/sda3/efi/Boot/bkpbootx64.efi)
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot-sav/sda3/efi/Boot/bootx64.efi
efi files in sda3/efi: /Microsoft/Boot/memtest.efi /Microsoft/Boot/LrsBootmgr.efi /Microsoft/Boot/bootx64.efi /Microsoft/Boot/bootmgr.efi /Microsoft/Boot/bootmgfw.efi /Microsoft/Boot/bkpbootmgfw.efi /ubuntu/shimx64.efi /Boot/bootx64.efi /Boot/bkpbootx64.efi
Add /mnt/boot-sav/sda3 efi entries in /mnt/etc/grub.d/25_custom
Adding custom /mnt/boot-sav/sda3/efi/Microsoft/Boot/bkpbootmgfw.efi
Adding custom /mnt/boot-sav/sda3/efi/Microsoft/Boot/LrsBootmgr.efi
Adding custom /mnt/boot-sav/sda3/efi/Boot/bkpbootx64.efi
sda3/bkpbootx64.efi already added
sda3/bkpbootmgfw.efi already added
sda3/LrsBootmgr.efi already added
df /dev/sda7
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot-sav/sda7/efi/Microsoft/Boot/bootmgfw.efi (& .grb)
df /dev/sda7
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot-sav/sda7/efi/Microsoft/Boot/bootx64.efi (& .grb)
df /dev/sda7
cp /mnt/boot/efi/EFI/ubuntu/shimx64.efi /mnt/boot-sav/sda7/efi/Boot/bootx64.efi (& .grb)
efi files in sda7/efi: /Microsoft/Boot/bootx64.efi /Microsoft/Boot/bootmgfw.efi /ubuntu/shimx64.efi /Boot/bootx64.efi
Add /mnt/boot-sav/sda7 efi entries in /mnt/etc/grub.d/25_custom
Installing for x86_64-efi platform.
Installation finished. No error reported.
grub-install --efi-directory=/boot/efi --target=x86_64-efi --uefi-secure-boot : exit code of grub-install :0

chroot /mnt efibootmgr -v
BootCurrent: 0006
Timeout: 0 seconds
BootOrder: 0000,0002,0003,0001,0005,2001,0004,2002,2003
Boot0000* grub  HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIgrubshimx64.efi)
Boot0001* Windows Boot Manager  HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIMicrosoftBootbootmgfw.efi)RC
Boot0002* ubuntu    HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIubuntushimx64.efi)
Boot0003* Windows Boot Manager  HD(2,GPT,04d00287-dc2f-45b2-95ee-8fec8c9ead64,0x1f4800,0x82000)/File(EFIMicrosoftBootbootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}....................
Boot0004* Lenovo Recovery System    HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIMicrosoftBootLrsBootMgr.efi)RC
Boot0005* ubuntu    HD(3,GPT,fa4c9ca9-5282-4f9d-8db5-e72e2d5dccc1,0x276800,0x1f4000)/File(EFIubuntushimx64.efi)RC
Boot0006* EFI USB Device (USB Flash Memory) PciRoot(0x0)/Pci(0x14,0x0)/USB(9,0)/HD(1,MBR,0x721678c7,0x3682ec,0x1240)RC
Boot2001* EFI USB Device    RC
Boot2002* EFI DVD/CDROM RC
Boot2003* EFI Network   RC

chroot /mnt update-grub
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-23-generic
Found initrd image: /boot/initrd.img-4.15.0-23-generic
Found linux image: /boot/vmlinuz-4.15.0-20-generic
Found initrd image: /boot/initrd.img-4.15.0-20-generic
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
Found Windows Boot Manager on /dev/sda2@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for EFI firmware configuration
Unhide GRUB boot menu in sda8/boot/grub/grub.cfg

Si è verificato un errore durante la riparazione.

Ora è possibile riavviare il computer.
Non dimenticare di impostare la priorità di avvio nel BIOS al file sda2/EFI/ubuntu/shimx64.efi!

Potrebbe servire riprovare dopo la disattivazione dell'opzione [Backup e rinominare Windows di  EFI File].

chiesto 11 Lug, 12:44

jackpagoda's gravatar image

jackpagoda
201

modificato 13 Lug, 22:11

dadexix86's gravatar image

dadexix86 ♦♦
16.9k816161

Potrebbe servire conoscere l'hardware e in questo caso:"prima di kubuntu avevo installato ubuntu 18.04. non ho cambiato nulla nelle impostazioni. semplicemente ho avviato la chiavetta di kubuntu e l'ho installato nella partizione dove prima c'era ubuntu"; sapere se prima dell'installazione di Kubuntu, la partizione con Ubuntu 18.04 è stata eliminata!

(12 Lug, 09:09) enzoge enzoge's gravatar image
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domanda posta: 11 Lug, 12:44

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