Unable to load into installed linuxmint os

I currently have Windows and Arch Linux installed on a drive with a GPT partition and grub. I am now trying to install Linux Mint alongside these two.

I am installing Mint on a second HDD (same PC) with an MBR partition and I am having trouble running the installed OS. I have tried adding it—not together, but in different tries—to both EFI (one in the GPT partition and one in the MBR partition) and both are giving errors.

The errors are "load kernel first, msdos not found". I will try to attach a screenshot. It comes at startup when I try to boot Linux Mint from grub.

I have tried everything. I can't format the entire second disk to GPT since I have data in other partitions of the disk. Any help would be appreciated.

I have tried changing boot to legacy, it also didn't work.

There seems to be a tool, mbr2gpt but I can't get it to work. I have no OS other than Linux Mint (installing) in the second HDD.

I don't know if its gpt issue or something else. Ubuntu also seems to have issue. It said some error like not authorized to access grub in gpt.

I have tried to install grub in mbr but it seems to overwrite grub with gpt and I couldn't login to arch.

Edit1:- This is the error on selecting linuxmint from grub

Edit2:-Adding boot-info from boot repair

boot-repair-4ppa200 [20240525_2040] ============================== 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 (,msdos3)/boot/grub. It also embeds following components: modules --------------------------------------------------------------------------- fshelp ext2 part_msdos biosdisk --------------------------------------------------------------------------- => No boot loader is installed in the MBR of /dev/sdb. => Syslinux MBR (5.00 and higher) is installed in the MBR of /dev/sdc. sda1: __________________________________________________________________________ File system: vfat Boot sector type: FAT32 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: sda2: __________________________________________________________________________ File system: ntfs Boot sector type: Windows 8/10/11/2012: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: sda3: __________________________________________________________________________ File system: Extended Partition Boot sector type: - Boot sector info: sda5: __________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: LMDE 6 (faye) Boot files: /etc/fstab /etc/default/grub sda6: __________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Boot files: sda7: __________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: sda4: __________________________________________________________________________ File system: ntfs Boot sector type: Windows 7/2008: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: sdb1: __________________________________________________________________________ File system: vfat Boot sector type: Windows 7/2008: FAT32 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: /efi/Boot/bootx64.efi /efi/GRUB/grubx64.efi /efi/Microsoft/Boot/bootmgfw.efi /efi/Microsoft/Boot/bootmgr.efi sdb2: __________________________________________________________________________ File system: Boot sector type: - Boot sector info: sdb3: __________________________________________________________________________ File system: ntfs Boot sector type: Windows 7/2008: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Windows 8 or 10 Boot files: /Windows/System32/winload.exe sdb4: __________________________________________________________________________ File system: ntfs Boot sector type: Windows 8/10/11/2012: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: sdb5: __________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Arch Linux Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub sdb6: __________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: sdc1: __________________________________________________________________________ File system: ntfs Boot sector type: SYSLINUX 6.04 Boot sector info: Syslinux looks at sector 44096 of /dev/sdc1 for its second stage. The integrity check of Syslinux failed. No errors found in the Boot Parameter Block. Operating System: Boot files: /boot/grub/grub.cfg /syslinux.cfg /ldlinux.sys sdc2: __________________________________________________________________________ File system: vfat Boot sector type: FAT16 Boot sector info: According to the info in the boot sector, sdc2 starts at sector 0. But according to the info from fdisk, sdc2 starts at sector 61437880. According to the info in the boot sector, sdc2 has 0 sectors. Operating System: Boot files: /efi/Boot/bootaa64.efi /efi/Boot/bootarm.efi /efi/Boot/bootia32.efi /efi/Boot/bootx64.efi /efi/Rufus/exfat_aa64.efi /efi/Rufus/exfat_arm.efi /efi/Rufus/exfat_ia32.efi /efi/Rufus/exfat_x64.efi /efi/Rufus/ntfs_aa64.efi /efi/Rufus/ntfs_arm.efi /efi/Rufus/ntfs_ia32.efi /efi/Rufus/ntfs_x64.efi ================================ 3 OS detected ================================= OS#1: LMDE 6 (faye) on sda5 OS#2: Arch Linux on sdb5 OS#3: Windows 8 or 10 on sdb3 ================================ Host/Hardware ================================= CPU architecture: 64-bit Video: 4th Gen Core Processor Integrated Graphics Controller from Intel Corporation Live-session OS is Linuxmint 64-bit (LMDE 6 (faye), faye, x86_64) ===================================== UEFI ===================================== BIOS/UEFI firmware: 79CN46WW(V3.05)(1.70) from LENOVO The firmware is EFI-compatible, and is set in EFI-mode for this live-session. SecureBoot disabled - SecureBoot disabled - Please report this message to [email protected]. BootCurrent: 0000 Timeout: 2 seconds BootOrder: 0003,0002,2001,2002,2003 Boot0000* EFI USB Device (Generic Flash Disk) PciRoot(0x0)/Pci(0x14,0x0)/USB(0,0)/HD(2,MBR,0x29c46,0x3a977b8,0x800)RC Boot0002* Windows Boot Manager HD(1,GPT,d51273d0-888f-4ca8-9490-a9ba15966eae,0x7d800,0x32000)/File(\EFI\MICROSOFT\BOOT\BOOTMGFW.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.}...a............. ... Boot0003* GRUB HD(1,GPT,d51273d0-888f-4ca8-9490-a9ba15966eae,0x7d800,0x32000)/File(\EFI\GRUB\grubx64.efi) Boot2001* EFI USB Device RC Boot2002* EFI DVD/CDROM RC Boot2003* EFI Network RC 04fb9982cb9d93492d3220cf08f03f02 sdb1/Boot/bootx64.efi a2418029711ac3b3e3bfd27223a1fb6d sdb1/GRUB/grubx64.efi 04fb9982cb9d93492d3220cf08f03f02 sdb1/Microsoft/Boot/bootmgfw.efi 8ea8644096bf0b8227e6541e9a790f8c sdb1/Microsoft/Boot/bootmgr.efi e099b8f8463ef839720fda267e70eeb1 sdc2/Boot/bootaa64.efi cfd0ce50df258fc747f5753ecf6ec312 sdc2/Boot/bootarm.efi 19a65a943434a625a53490391fa28349 sdc2/Boot/bootia32.efi 3fdfc83db7958b2eac1e720334f12147 sdc2/Boot/bootx64.efi 4a4e8e66e0d3712f19d964a7bca4fafc sdc2/Rufus/exfat_aa64.efi 93f66a43d49990f986a81c67843d66a5 sdc2/Rufus/exfat_arm.efi 3c5f23f198267df4a64fe2a3587039e7 sdc2/Rufus/exfat_ia32.efi 81d015f35982a0bbf4056f09a2eca39a sdc2/Rufus/exfat_x64.efi a03e27b0e7f2e03519166bf6b41f68c5 sdc2/Rufus/ntfs_aa64.efi 2f31c70d3f4235476cd9ed6a18e13221 sdc2/Rufus/ntfs_arm.efi 7e7e67c33ce9ff2961a4be4080d23352 sdc2/Rufus/ntfs_ia32.efi 30c7e0752040cf5e31843d897a53e055 sdc2/Rufus/ntfs_x64.efi ============================= Drive/Partition Info ============================= Disks info: ____________________________________________________________________ sdb : is-GPT, no-BIOSboot, has---ESP, not-usb, not-mmc, has-os, has-win, 2048 sectors * 512 bytes sdc : notGPT, no-BIOSboot, has---ESP, usb-disk, not-mmc, no-os, no-wind, 2048 sectors * 512 bytes sda : notGPT, no-BIOSboot, has-noESP, not-usb, not-mmc, has-os, no-wind, 2048 sectors * 512 bytes Partitions info (1/3): _________________________________________________________ sdb4 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios sdb5 : is-os, 64, pacman, no-docgrub, grub2, grub-install, grubenv-ok, grub-mkconfig -o /boot/grub, farbios sdb3 : is-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios sdb1 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far sdc2 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far sda4 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, farbios sda2 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far sda5 : is-os, 64, apt-get, grub-pc , grub2, grub-install, no-grubenv, update-grub, not-far sda1 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far sda6 : no-os, 32, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far Partitions info (2/3): _________________________________________________________ sdb4 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot sdb5 : isnotESP, fstab-without-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot sdb3 : isnotESP, part-has-no-fstab, no-nt, haswinload, no-recov-nor-hid, no-bmgr, notwinboot sdb1 : is---ESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot sdc2 : is---ESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot sda4 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot sda2 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot sda5 : isnotESP, fstab-has-goodEFI, 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, no-bmgr, notwinboot sda6 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot Partitions info (3/3): _________________________________________________________ sdb4 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sdb sdb5 : not--sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sdb sdb3 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sdb sdb1 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sdb sdc2 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sdc sda4 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sda sda2 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sda sda5 : not--sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sda sda1 : is---sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sda sda6 : maybesepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sda fdisk -l (filtered): ___________________________________________________________ Disk sda: 232.89 GiB, 250059350016 bytes, 488397168 sectors Disk identifier: 0xf638964d Boot Start End Sectors Size Id Type sda1 2048 206847 204800 100M 7 HPFS/NTFS/exFAT sda2 206848 39266303 39059456 18.6G 7 HPFS/NTFS/exFAT sda3 39270398 205006847 165736450 79G 5 Extended sda4 205006848 488392703 283385856 135.1G 7 HPFS/NTFS/exFAT sda5 39272448 72040447 32768000 15.6G 83 Linux sda6 72042496 135530495 63488000 30.3G 83 Linux sda7 135532544 146796543 11264000 5.4G 82 Linux swap / Solaris Partition table entries are not in disk order. Disk sdb: 447.13 GiB, 480103981056 bytes, 937703088 sectors Disk identifier: 3DAEA9F5-FE33-4404-8FF7-EFDA8914769F Start End Sectors Size Type sdb1 514048 718847 204800 100M EFI System sdb2 718848 751615 32768 16M Microsoft reserved sdb3 751616 512751615 512000000 244.1G Microsoft basic data sdb4 512751616 753379327 240627712 114.7G Microsoft basic data sdb5 753379328 921151487 167772160 80G Linux filesystem sdb6 921151488 937701375 16549888 7.9G Linux swap Disk sdc: 29.3 GiB, 31457280000 bytes, 61440000 sectors Disk identifier: 0x00029c46 Boot Start End Sectors Size Id Type sdc1 * 2048 61437879 61435832 29.3G 7 HPFS/NTFS/exFAT sdc2 61437880 61439927 2048 1M ef EFI (FAT-12/16/32) parted -lm (filtered): _________________________________________________________ sda:250GB:scsi:512:512:msdos:ATA TOSHIBA MK2555GS:; 1:1049kB:106MB:105MB:fat32::; 2:106MB:20.1GB:20.0GB:ntfs::; 3:20.1GB:105GB:84.9GB:::; 5:20.1GB:36.9GB:16.8GB:ext4::; 6:36.9GB:69.4GB:32.5GB:ext4::; 7:69.4GB:75.2GB:5767MB:linux-swap(v1)::swap; 4:105GB:250GB:145GB:ntfs::; sdb:480GB:scsi:512:512:gpt:ATA GIGABYTE GP-GSTF:; 1:263MB:368MB:105MB:fat32:EFI system partition:boot, esp; 2:368MB:385MB:16.8MB::Microsoft reserved partition:msftres; 3:385MB:263GB:262GB:ntfs:Basic data partition:msftdata; 4:263GB:386GB:123GB:ntfs:Basic data partition:msftdata; 5:386GB:472GB:85.9GB:ext4::; 6:472GB:480GB:8474MB:linux-swap(v1)::swap; sdc:31.5GB:scsi:512:512:msdos:Generic Flash Disk:; 1:1049kB:31.5GB:31.5GB:ntfs::boot; 2:31.5GB:31.5GB:1049kB:::esp; Free space >10MiB: ______________________________________________________________ sda: 71678MiB:100101MiB:28423MiB sdb: 0.02MiB:251MiB:251MiB blkid (filtered): ______________________________________________________________ NAME FSTYPE UUID PARTUUID LABEL PARTLABEL sda ├─sda1 vfat 5723-D062 f638964d-01 ├─sda2 ntfs 267C88077C87CFCB f638964d-02 New Volume ├─sda3 f638964d-03 ├─sda4 ntfs DC8C86758C8649CA f638964d-04 New Volume ├─sda5 ext4 36e0d91a-caa4-40b8-bd15-d264910228dd f638964d-05 ├─sda6 ext4 e9f531a4-b065-4a8c-a0d3-756b486e5d84 f638964d-06 └─sda7 swap 35401696-3044-46b3-82f3-d6eb6e9151a9 f638964d-07 sdb ├─sdb1 vfat 3416-50EE d51273d0-888f-4ca8-9490-a9ba15966eae EFI system partition ├─sdb2 751b43fb-bbae-402c-87ef-8a8745bb3804 Microsoft reserved partition ├─sdb3 ntfs FCB040C8B0408ADA fb0cea09-889d-43f1-89a1-e6ea4e84b376 Basic data partition ├─sdb4 ntfs 3894A28694A2466A 97dcb553-4f8a-4b44-9e73-8176de7968ce New Volume Basic data partition ├─sdb5 ext4 959afc21-ab26-4c23-82b1-cd4ad6afb826 82c37fd0-5918-437f-af1e-ad9d408c52f9 └─sdb6 swap 302c29c8-cfc0-43af-a5ac-49ecb572b079 57783657-fb60-47ae-befe-2f8b2780c769 sdc ├─sdc1 ntfs 64D05309D052E0BA 00029c46-01 LMDE 6 Cinnamon 64-bit └─sdc2 vfat 5FA3-F2DA 00029c46-02 UEFI_NTFS Mount points (filtered): _______________________________________________________ Avail Use% Mounted on /dev/sda1 0 100% /mnt/boot-sav/sda1 /dev/sda2 1G 94% /mnt/boot-sav/sda2 /dev/sda4 7G 95% /mnt/boot-sav/sda4 /dev/sda5 7.4G 46% /mnt/boot-sav/sda5 /dev/sda6 28.1G 0% /mnt/boot-sav/sda6 /dev/sdb1 68.5M 29% /mnt/boot-sav/sdb1 /dev/sdb3 175.7G 28% /mnt/boot-sav/sdb3 /dev/sdb4 44.5G 61% /mnt/boot-sav/sdb4 /dev/sdb5 40G 44% /mnt/boot-sav/sdb5 /dev/sdc1 26.7G 9% /run/live/medium /dev/sdc1 26.7G 9% /usr/lib/live/mount/medium /dev/sdc2 126K 87% /mnt/boot-sav/sdc2 overlay 1.8G 5% / Mount options (filtered): ______________________________________________________ /dev/sda1 vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro /dev/sda2 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096 /dev/sda4 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096 /dev/sda5 ext4 rw,relatime /dev/sda6 ext4 rw,relatime /dev/sdb1 vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro /dev/sdb3 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096 /dev/sdb4 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096 /dev/sdb5 ext4 rw,relatime /dev/sdc1 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096 /dev/sdc1 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096 /dev/sdc2 vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro ==================== sda1: Location of files loaded by Grub ==================== GiB - GB File Fragment(s) ?? = ?? vmlinuz-6.1.0-12-amd64 1 ?? = ?? initrd.img-6.1.0-12-amd64 2 ?? = ?? initrd.img-6.1.0-12-amd64.dpkg-bak 2 ========================== sda5/etc/fstab (filtered) =========================== proc /proc proc defaults 0 0 UUID=3416-50EE /boot/efi vfat defaults 0 1 UUID=36e0d91a-caa4-40b8-bd15-d264910228dd / ext4 rw,errors=remount-ro 0 1 UUID=35401696-3044-46b3-82f3-d6eb6e9151a9 swap swap sw 0 0 UUID=e9f531a4-b065-4a8c-a0d3-756b486e5d84 /home ext4 rw,errors=remount-ro 0 0 ======================= sda5/etc/default/grub (filtered) ======================= GRUB_DEFAULT=0 GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet" GRUB_CMDLINE_LINUX="" ==================== sda5: Location of files loaded by Grub ==================== GiB - GB File Fragment(s) 28.007579803 = 30.072909824 boot/vmlinuz-6.1.0-12-amd64 1 28.007579803 = 30.072909824 vmlinuz 1 28.007579803 = 30.072909824 vmlinuz.old 1 29.340026855 = 31.503613952 boot/initrd.img-6.1.0-12-amd64 1 29.340026855 = 31.503613952 initrd.img 1 29.340026855 = 31.503613952 initrd.img.old 1 ===================== sda5: ls -l /etc/grub.d/ (filtered) ====================== -rwxr-xr-x 1 root root 14123 Apr 23 2023 10_linux -rwxr-xr-x 1 root root 14180 Apr 23 2023 20_linux_xen -rwxr-xr-x 1 root root 12923 Apr 23 2023 30_os-prober -rwxr-xr-x 1 root root 1372 Apr 23 2023 30_uefi-firmware -rwxr-xr-x 1 root root 722 Feb 26 2023 35_fwupd -rwxr-xr-x 1 root root 214 Apr 23 2023 40_custom -rwxr-xr-x 1 root root 215 Apr 23 2023 41_custom =========================== sda5/etc/grub.d/35_fwupd =========================== #! /bin/sh # SPDX-License-Identifier: LGPL-2.1+ set -e [ -d ${pkgdatadir:?} ] # shellcheck source=/dev/null . "$pkgdatadir/grub-mkconfig_lib" if [ -f /var/lib/fwupd/uefi_capsule.conf ] && ls /sys/firmware/efi/efivars/fwupd-*-0abba7dc-e516-4167-bbf5-4d9d1c739416 1>/dev/null 2>&1; then . /var/lib/fwupd/uefi_capsule.conf if [ "${EFI_PATH}" != "" ] && [ "${ESP}" != "" ]; then echo "Adding Linux Firmware Updater entry" >&2 cat << EOF menuentry 'Linux Firmware Updater' \$menuentry_id_option 'fwupd' { EOF ${grub_probe:?} --version > /dev/null prepare_grub_to_access_device "$(${grub_probe} --target=device ${ESP})" | sed -e "s/^/\t/" cat << EOF chainloader ${EFI_PATH} } EOF fi fi ====================== sdb5/boot/grub/grub.cfg (filtered) ====================== Arch Linux 959afc21-ab26-4c23-82b1-cd4ad6afb826 Arch Linux, with Linux linux 959afc21-ab26-4c23-82b1-cd4ad6afb826 Arch Linux, with Linux linux (fallback initramfs) gnulinux-linux-fallback-959afc21-ab26-4c23-82b1-cd4ad6afb826 Windows Boot Manager (on sda1) osprober-efi-3416-50EE LMDE 6 (faye) (on sdb5) 36e0d91a-caa4-40b8-bd15-d264910228dd ### END /etc/grub.d/30_os-prober ### UEFI Firmware Settings uefi-firmware ### END /etc/grub.d/30_uefi-firmware ### ========================== sdb5/etc/fstab (filtered) =========================== # <file system> <dir> <type> <options> <dump> <pass> UUID=959afc21-ab26-4c23-82b1-cd4ad6afb826 / ext4 rw,relatime 0 1 UUID=3416-50EE /efi vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro 0 2 UUID=302c29c8-cfc0-43af-a5ac-49ecb572b079 none swap defaults 0 0 ======================= sdb5/etc/default/grub (filtered) ======================= GRUB_DEFAULT=0 GRUB_TIMEOUT=-1 GRUB_DISTRIBUTOR="Arch" GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet" GRUB_CMDLINE_LINUX="" GRUB_PRELOAD_MODULES="part_gpt part_msdos" GRUB_TIMEOUT_STYLE=menu GRUB_TERMINAL_INPUT=console GRUB_GFXMODE=auto GRUB_GFXPAYLOAD_LINUX=keep GRUB_DISABLE_RECOVERY=true GRUB_DISABLE_OS_PROBER=false ==================== sdb5: Location of files loaded by Grub ==================== GiB - GB File Fragment(s) 433.167007446 = 465.109532672 boot/grub/grub.cfg 1 384.229732513 = 412.563533824 boot/vmlinuz 1 379.989253998 = 408.010354688 boot/vmlinuz-linux 2 395.520416260 = 424.686813184 boot/vmlinuz.old 1 427.176753998 = 458.677547008 boot/initramfs-linux-fallback.img 12 365.950191498 = 392.936026112 boot/initramfs-linux.img 2 ===================== sdb5: ls -l /etc/grub.d/ (filtered) ====================== -rwxr-xr-x 1 root root 12579 Mar 16 19:09 10_linux lrwxrwxrwx 1 root root 34 May 18 14:48 15_ostree -> /usr/lib/libostree/grub2-15_ostree -rwxr-xr-x 1 root root 14341 Mar 16 19:09 20_linux_xen -rwxr-xr-x 1 root root 786 Mar 16 19:09 25_bli -rwxr-xr-x 1 root root 12289 Mar 16 19:09 30_os-prober -rwxr-xr-x 1 root root 1174 Mar 16 19:09 30_uefi-firmware -rwxr-xr-x 1 root root 214 Mar 16 19:09 40_custom -rwxr-xr-x 1 root root 215 Mar 16 19:09 41_custom ============================ sdb5/etc/grub.d/25_bli ============================ #! /bin/sh set -e # grub-mkconfig helper script. # Copyright (C) 2023 Free Software Foundation, Inc. # # GRUB is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # GRUB is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with GRUB. If not, see <http://www.gnu.org/licenses/>. cat << EOF if [ "\$grub_platform" = "efi" ]; then insmod bli fi EOF ====================== sdc1/boot/grub/grub.cfg (filtered) ====================== Start LMDE 6 64-bit Start LMDE 6 64-bit (compatibility mode) Boot from next volume UEFI Firmware Settings Memory test ========================= sdc1/syslinux.cfg (filtered) ========================= DEFAULT loadconfig LABEL loadconfig CONFIG /isolinux/isolinux.cfg APPEND /isolinux/ ==================== sdc1: Location of files loaded by Grub ==================== GiB - GB File Fragment(s) ?? = ?? boot/grub/grub.cfg ================== sdc1: Location of files loaded by Syslinux ================== GiB - GB File Fragment(s) ?? = ?? syslinux.cfg ?? = ?? ldlinux.sys 1 Suggested repair: ______________________________________________________________ The default repair of the Boot-Repair utility would purge (in order to fix packages) and reinstall the grub-efi of sda5, using the following options: sdb1/boot/efi Additional repair would be performed: unhide-bootmenu-10s use-standard-efi-file Final advice in case of suggested repair: ______________________________________ Please do not forget to make your UEFI firmware boot on the LMDE 6 (faye) entry (sdb1/efi/****/grub****.efi (**** will be updated in the final message) file) ! If your computer reboots directly into Windows, try to change the boot order in your UEFI firmware. If your UEFI firmware does not allow to change the boot order, change the default boot entry of the Windows bootloader. For example you can boot into Windows, then type the following command in an admin command prompt: bcdedit /set {bootmgr} path \EFI\****\grub****.efi (**** will be updated in the final message) 

Edit:- This is menu entry in grub config

menuentry 'LMDE 6 (faye) (on /dev/sdb5)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz.old--36e0d91a-caa4-40b8-bd15-d264910228dd' { insmod part_msdos insmod ext2 set root='hd1,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos5 --hint-efi=hd1,msdos5 --hint-baremetal=ahci1,msdos5 36e0d91a-caa4-40b8-bd15-d264910228dd else search --no-floppy --fs-uuid --set=root 36e0d91a-caa4-40b8-bd15-d264910228dd fi linux /vmlinuz.old root=/dev/sdb5 initrd /initrd.img.old } 

This is the UUID in sdb5 where os is installed

/dev/sdb5: UUID="36e0d91a-caa4-40b8-bd15-d264910228dd" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="f638964d-05" 

The UUID seems to be different in the error during boot. But grub config seems to be correct