Je colle ton Boot-info :
boot-info-4ppa125 [20210127_1328]
============================== Boot Info Summary ===============================
=> Grub2 (v2.00) is installed in the MBR of /dev/sda and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for /boot/grub. It also embeds following components:
modules
---------------------------------------------------------------------------
fshelp ext2 part_msdos biosdisk search_fs_uuid
---------------------------------------------------------------------------
config script
---------------------------------------------------------------------------
search.fs_uuid 79459faf-4cc7-4f9c-b6c0-fe4c0dd68c61 root hd1,msdos5
set prefix=($root)'/boot/grub'
---------------------------------------------------------------------------
=> Grub2 (v2.00) is installed in the MBR of /dev/sdb and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for (,msdos5)/boot/grub. It also embeds following components:
modules
---------------------------------------------------------------------------
fshelp ext2 part_msdos biosdisk
---------------------------------------------------------------------------
=> libparted MBR boot code is installed in the MBR of /dev/sdc.
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: /bootmgr /Boot/BCD
sda2: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 8 or 10
Boot files: /Windows/System32/winload.exe
sda3: __________________________________________________________________________
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:
sdb1: __________________________________________________________________________
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:
sdb2: __________________________________________________________________________
File system: Extended Partition
Boot sector type: -
Boot sector info:
sdb5: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 20.04.1 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
/boot/grub/i386-pc/core.img
sdc1: __________________________________________________________________________
File system: ntfs
Boot sector type: Unknown
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
================================ 3 OS detected =================================
OS#1: L'OS actuellement utilisé - Ubuntu 20.04.1 LTS CurrentSession on sdb5
OS#2: Windows 10 (boot) on sda1
OS#3: Windows 8 or 10 on sda2
============================ Architecture/Host Info ============================
CPU architecture: 64-bit
BOOT_IMAGE of the installed session in use:
/boot/vmlinuz-5.4.0-64-generic root=UUID=79459faf-4cc7-4f9c-b6c0-fe4c0dd68c61 ro quiet splash
===================================== UEFI =====================================
This installed-session is not in EFI-mode.
EFI in dmesg.
[ 0.008759] ACPI: UEFI 0x00000000CA6BB380 000042 (v01 INTEL EDK2 00000002 01000013)
============================= Drive/Partition Info =============================
Disks info: ____________________________________________________________________
sdb : notGPT, no-BIOSboot, has-noESP, not-usb, not-mmc, has-os, 2048 sectors * 512 bytes
sda : notGPT, no-BIOSboot, has-noESP, not-usb, not-mmc, has-os, 2048 sectors * 512 bytes
sdc : notGPT, no-BIOSboot, has-noESP, not-usb, not-mmc, no-os, 2048 sectors * 512 bytes
Partitions info (1/3): _________________________________________________________
sdb5 : is-os, 64, apt-get, grub-pc , grub2, grub-install, grubenv-ok, update-grub, farbios
sda1 : is-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
sda2 : is-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sda3 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sdb1 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
sdc1 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios
Partitions info (2/3): _________________________________________________________
sdb5 : isnotESP, fstab-without-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sda1 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, bootmgr, is-winboot
sda2 : isnotESP, part-has-no-fstab, no-nt, haswinload, no-recov-nor-hid, no-bmgr, notwinboot
sda3 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sdb1 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
sdc1 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot
Partitions info (3/3): _________________________________________________________
sdb5 : not-sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sdb
sda1 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda2 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sda3 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sda
sdb1 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sdb
sdc1 : not-sepboot, no-boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, std-grub.d, sdc
fdisk -l (filtered): ___________________________________________________________
Disk sda: 111.81 GiB, 120034123776 bytes, 234441648 sectors
Disk identifier: 0x8ec10b4d
Boot Start End Sectors Size Id Type
sda1 * 2048 1026047 1024000 500M 7 HPFS/NTFS/exFAT
sda2 1026048 233358753 232332706 110.8G 7 HPFS/NTFS/exFAT
sda3 233359360 234436607 1077248 526M 27 Hidden NTFS WinRE
Disk sdb: 232.91 GiB, 250059350016 bytes, 488397168 sectors
Disk identifier: 0xf0dad066
Boot Start End Sectors Size Id Type
sdb1 2048 240579099 240577052 114.7G 7 HPFS/NTFS/exFAT
sdb2 240580606 488396799 247816194 118.2G 5 Extended
sdb5 240580608 488396799 247816192 118.2G 83 Linux
Disk sdc: 149.5 GiB, 160041885696 bytes, 312581808 sectors
Disk identifier: 0xb21b988b
Boot Start End Sectors Size Id Type
sdc1 2048 312580095 312578048 149.1G 7 HPFS/NTFS/exFAT
parted -lm (filtered): _________________________________________________________
sda:120GB:scsi:512:512:msdos:ATA WDC WDS120G1G0B-:;
1:1049kB:525MB:524MB:ntfs::boot;
2:525MB:119GB:119GB:ntfs::;
3:119GB:120GB:552MB:ntfs::msftres;
sdb:250GB:scsi:512:512:msdos:ATA WDC WDS250G1B0A-:;
1:1049kB:123GB:123GB:ntfs::;
2:123GB:250GB:127GB:::;
5:123GB:250GB:127GB:ext4::;
sdc:160GB:scsi:512:512:msdos:Generic External:;
1:1049kB:160GB:160GB:ntfs::;
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda1 ntfs C0943B63943B5ADC 8ec10b4d-01 Réservé au système
├─sda2 ntfs 869640A996409B95 8ec10b4d-02
└─sda3 ntfs 0A627D16627D0829 8ec10b4d-03
sdb
├─sdb1 ntfs 2044018544015EC2 f0dad066-01 Disque
├─sdb2 f0dad066-02
└─sdb5 ext4 79459faf-4cc7-4f9c-b6c0-fe4c0dd68c61 f0dad066-05
sdc
└─sdc1 ntfs 634BEAD83C7999E3 b21b988b-01 moa160
df (filtered): _________________________________________________________________
Avail Use% Mounted on
sda1 471.5M 6% /mnt/boot-sav/sda1
sda2 59.3G 46% /mnt/boot-sav/sda2
sda3 82.3M 84% /mnt/boot-sav/sda3
sdb1 98.1G 14% /mnt/boot-sav/sdb1
sdb5 54.9G 47% /
sdc1 83.6G 44% /mnt/ata-Hitachi_HTS541616J9SA00_SB2481GJH2VJUE-part1
Mount options: __________________________________________________________________
sda1 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda2 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sda3 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sdb1 rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096
sdb5 rw,relatime,errors=remount-ro
sdc1 rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096
====================== sdb5/boot/grub/grub.cfg (filtered) ======================
Ubuntu 79459faf-4cc7-4f9c-b6c0-fe4c0dd68c61
Ubuntu, with Linux 5.4.0-65-generic 79459faf-4cc7-4f9c-b6c0-fe4c0dd68c61
Ubuntu, with Linux 5.4.0-64-generic 79459faf-4cc7-4f9c-b6c0-fe4c0dd68c61
Ubuntu, with Linux 5.4.0-62-generic 79459faf-4cc7-4f9c-b6c0-fe4c0dd68c61
Windows 10 (on sda1) C0943B63943B5ADC
### END /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_uefi-firmware ###
========================== sdb5/etc/fstab (filtered) ===========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb5 during installation
UUID=79459faf-4cc7-4f9c-b6c0-fe4c0dd68c61 / ext4 errors=remount-ro 0 1
/swapfile none swap sw 0 0
/dev/disk/by-id/ata-Hitachi_HTS541616J9SA00_SB2481GJH2VJUE-part1 /mnt/ata-Hitachi_HTS541616J9SA00_SB2481GJH2VJUE-part1 auto nosuid,nodev,nofail,x-gvfs-show 0 0
======================= sdb5/etc/default/grub (filtered) =======================
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
GRUB_TERMINAL=console
GRUB_GFXPAYLOAD_LINUX=None
==================== sdb5: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
180.872043610 = 194.209878016 boot/grub/grub.cfg 1
198.297554016 = 212.920377344 boot/grub/i386-pc/core.img 1
145.525531769 = 156.256849920 boot/vmlinuz 1
186.541156769 = 200.297041920 boot/vmlinuz-5.4.0-62-generic 2
185.392719269 = 199.063916544 boot/vmlinuz-5.4.0-64-generic 1
145.525531769 = 156.256849920 boot/vmlinuz-5.4.0-65-generic 1
185.392719269 = 199.063916544 boot/vmlinuz.old 1
146.778537750 = 157.602254848 boot/initrd.img 5
146.514369965 = 157.318606848 boot/initrd.img-5.4.0-62-generic 5
146.529994965 = 157.335384064 boot/initrd.img-5.4.0-64-generic 6
146.778537750 = 157.602254848 boot/initrd.img-5.4.0-65-generic 5
146.529994965 = 157.335384064 boot/initrd.img.old 6
===================== sdb5: ls -l /etc/grub.d/ (filtered) ======================
-rwxr-xr-x 1 root root 17622 sept. 8 12:24 10_linux
-rwxr-xr-x 1 root root 42359 sept. 8 12:24 10_linux_zfs
-rwxr-xr-x 1 root root 12894 sept. 8 12:24 20_linux_xen
-rwxr-xr-x 1 root root 12059 juil. 6 2017 30_os-prober
-rwxr-xr-x 1 root root 1424 sept. 8 12:24 30_uefi-firmware
-rwxr-xr-x 1 root root 214 juil. 6 2017 40_custom
-rwxr-xr-x 1 root root 216 juil. 6 2017 41_custom
======================== Unknown MBRs/Boot Sectors/etc =========================
Unknown BootLoader on sdc1
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 8f a1 12 00 00 00 00 |................|
00000030 04 00 00 00 00 00 00 00 ff 18 2a 01 00 00 00 00 |..........*.....|
00000040 f6 00 00 00 01 00 00 00 e3 99 79 3c d8 ea 4b 63 |..........y<..Kc|
00000050 00 00 00 00 0e 1f be 71 7c ac 22 c0 74 0b 56 b4 |.......q|.".t.V.|
00000060 0e bb 07 00 cd 10 5e eb f0 32 e4 cd 16 cd 19 eb |......^..2......|
00000070 fe 54 68 69 73 20 69 73 20 6e 6f 74 20 61 20 62 |.This is not a b|
00000080 6f 6f 74 61 62 6c 65 20 64 69 73 6b 2e 20 50 6c |ootable disk. Pl|
00000090 65 61 73 65 20 69 6e 73 65 72 74 20 61 20 62 6f |ease insert a bo|
000000a0 6f 74 61 62 6c 65 20 66 6c 6f 70 70 79 20 61 6e |otable floppy an|
000000b0 64 0d 0a 70 72 65 73 73 20 61 6e 79 20 6b 65 79 |d..press any key|
000000c0 20 74 6f 20 74 72 79 20 61 67 61 69 6e 20 2e 2e | to try again ..|
000000d0 2e 20 0d 0a 00 00 00 00 00 00 00 00 00 00 00 00 |. ..............|
000000e0 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
================================= User choice ==================================
Is sdb (ATA WDC WDS250G1B0A-) a removable disk? no
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility would reinstall the grub2 of
sdb5 into the MBRs of all disks (except live-disks and removable disks without OS).
Additional repair would be performed: unhide-bootmenu-10s win-legacy-basic-fix
Final advice in case of suggested repair: ______________________________________
Please do not forget to make your BIOS boot on sdb (ATA WDC WDS250G1B0A-) disk!