Hi there
Everything was going ok and I've done a restart after a clean install.
I don't have dual boot and the OS is installed on new SSD.
I've deactivated the fast boot, but the secure boot is greyed out set on enable.
I have an Asus. Thanks
This is what I get from Boor Repair
boot-repair-4ppa2081-zorin1 [20260222_2209]
============================== Boot Info Summary ===============================
=> Grub2 (v1.99-2.00) is installed in the MBR of /dev/sda and looks at sector
2048 of the same hard drive for core.img, but core.img can not be found at
this location.
=> No boot loader is installed in the MBR of /dev/sdb.
sda1: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System:
Boot files:
sda2: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System:
Boot files:
sdb1: __________________________________________________________________________
File system: vfat
Boot sector type: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sdb2: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Zorin OS 18
Boot files: /boot/grub/grub.cfg /etc/fstab /etc/default/grub
sdc: ___________________________________________________________________________
File system: iso9660
Boot sector type: Unknown
Boot sector info:
Mounting failed: mount: /mnt/BootInfo/FD/sdc: /dev/sdc already mounted or mount point busy.
dmesg(1) may have more information after failed mount system call.
================================ 1 OS detected =================================
OS#1 (linux): Zorin OS 18 (18) on sdb2
================================ Host/Hardware =================================
CPU architecture: 64-bit
Video: Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] from Advanced Micro Devices, Inc. [AMD/ATI]
Live-session OS is Zorin 64-bit (Zorin OS 18, noble, x86_64)
===================================== UEFI =====================================
BIOS/UEFI firmware: 1002(4.6) from American Megatrends Inc.
This live-session is in Legacy/BIOS/CSM mode (not in EFI mode).
============================= Drive/Partition Info =============================
Disks info: ____________________________________________________________________
sda : is-GPT, no-BIOSboot, has-noESP, not-usb, not-mmc, no-os, no-wind, 34 sectors * 512 bytes
sdb : is-GPT, no-BIOSboot, has---ESP, not-usb, not-mmc, has-os, no-wind, 2048 sectors * 512 bytes
Partitions info (1/3): _________________________________________________________
sda1 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, end-after-100GB
sda2 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, end-after-100GB
sdb1 : no-os, 64, nopakmgr, no-docgrub, nogrub, nogrubinstall, no-grubenv, noupdategrub, not-far
sdb2 : is-os, 64, apt-get, signed grub-pc grub-efi , grub2, grub-install, grubenv-ok, update-grub, end-after-100GB
Partitions info (2/3): _________________________________________________________
sda1 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ext4
sda2 : isnotESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ext4
sdb1 : is---ESP, part-has-no-fstab, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, vfat
sdb2 : isnotESP, fstab-has-bad-efi, no-nt, no-winload, no-recov-nor-hid, no-bmgr, notwinboot, ext4
Partitions info (3/3): _________________________________________________________
sda1 : maybesepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sda
sda2 : maybesepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sda
sdb1 : not--sepboot, no---boot, part-has-no-fstab, not-sep-usr, no---usr, part-has-no-fstab, no--grub.d, sdb
sdb2 : not--sepboot, with-boot, fstab-without-boot, not-sep-usr, with--usr, fstab-without-usr, std-grub.d, sdb
fdisk -l (filtered): ___________________________________________________________
Disk sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors
Disk identifier: 505ECACC-499C-4069-BC36-E2A8AC8BEDAC
Start End Sectors Size Type
sda1 34 976564257 976564224 465.7G Linux filesystem
sda2 976566272 1953523711 976957440 465.8G Linux filesystem
Disk sdb: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk identifier: B597625A-0C3F-42FA-8618-AD353DF5CE1B
Start End Sectors Size Type
sdb1 2048 1050623 1048576 512M EFI System
sdb2 1050624 3907028991 3905978368 1.8T Linux filesystem
Disk sdc: 7.5 GiB, 8053063680 bytes, 15728640 sectors
Disk identifier: 0x30cb82d5
Boot Start End Sectors Size Id Type
sdc1 * 0 7391103 7391104 3.5G 0 Empty
sdc2 604 10843 10240 5M ef EFI (FAT-12/16/32)
sdc3 7393280 15728639 8335360 4G 83 Linux
parted -lm (filtered): _________________________________________________________
sda:1000GB:scsi:512:512:gpt:ATA Samsung SSD 860:;
1:17.4kB:500GB:500GB:ext4::;
2:500GB:1000GB:500GB:ext4::;
sdb:2000GB:scsi:512:512:gpt:ATA Samsung SSD 870:;
1:1049kB:538MB:537MB:fat32:EFI System Partition:boot, esp;
2:538MB:2000GB:2000GB:ext4::;
sdc:8053MB:scsi:512:512:msdos:General UDisk:;
2:309kB:5552kB:5243kB:::esp;
3:3785MB:8053MB:4268MB:ext4::;
Free space >10MiB: ______________________________________________________________
sdc: 5.29MiB:3610MiB:3605MiB
blkid (filtered): ______________________________________________________________
NAME FSTYPE UUID PARTUUID LABEL PARTLABEL
sda
├─sda1 ext4 a1fe4db8-7f97-43d6-b4c3-c8a709c579da 42b04274-816d-4430-a20c-126efabb1c61 backup-860
└─sda2 ext4 2c3e5025-091a-4355-a1ab-8ce554528343 30aa4ebe-c11e-4b2d-8879-711921038a61 new_860_back
sdb
├─sdb1 vfat E64D-CF75 e9ca1b35-caf6-452d-a44f-a917eef4453b EFI System Partition
└─sdb2 ext4 b744362e-fd9f-4c24-b129-48f497bf08e8 8efbef83-c747-498f-a8c0-9b05d8a5a66a
sdc iso9660 2025-10-13-20-57-57-00 Zorin OS 18 Core 64bit
├─sdc1 iso9660 2025-10-13-20-57-57-00 30cb82d5-01 Zorin OS 18 Core 64bit
├─sdc2 vfat 7CC1-2D2A 30cb82d5-02
└─sdc3 ext4 55dde4cd-992b-432c-8a6c-8bfff615adc4 30cb82d5-03 writable
Mount points (filtered): _______________________________________________________
Avail Use% Mounted on
/dev/sda1 434G 0% /mnt/boot-sav/sda1
/dev/sda2 434.2G 0% /mnt/boot-sav/sda2
/dev/sdb1 511M 0% /mnt/boot-sav/sdb1
/dev/sdb2 1.6T 7% /mnt/boot-sav/sdb2
/dev/sdc1 0 100% /cdrom
/dev/sdc3 3.6G 0% /media/zorin/writable
Mount options (filtered): ______________________________________________________
/dev/sda1 ext4 rw,relatime
/dev/sda2 ext4 rw,relatime
/dev/sdb1 vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro
/dev/sdb2 ext4 rw,relatime
/dev/sdc1 iso9660 ro,noatime,nojoliet,check=s,map=n,blocksize=2048,iocharset=utf8
/dev/sdc3 ext4 rw,nosuid,nodev,relatime
====================== sdb2/boot/grub/grub.cfg (filtered) ======================
Zorin OS b744362e-fd9f-4c24-b129-48f497bf08e8
Linux Mint 22.2 Zara (22.2) (on sda3) 747ef5b2-7982-4f5b-b22a-4955d16d6cea
### END /etc/grub.d/30_os-prober ###
UEFI Firmware Settings uefi-firmware
### END /etc/grub.d/30_uefi-firmware ###
========================== sdb2/etc/fstab (filtered) ===========================
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb2 during installation
UUID=b744362e-fd9f-4c24-b129-48f497bf08e8 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda2 during installation
UUID=FF4C-FD15 /boot/efi vfat umask=0077 0 1
/swapfile none swap sw 0 0
======================= sdb2/etc/default/grub (filtered) =======================
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`( . /etc/os-release; echo ${NAME:-Ubuntu} ) 2>/dev/null || echo Ubuntu`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
GRUB_THEME=/usr/share/grub/themes/zorin/theme.txt
GRUB_DISABLE_MEMTEST=true
==================== sdb2: Location of files loaded by Grub ====================
GiB - GB File Fragment(s)
15.709854126 = 16.868327424 boot/grub/grub.cfg 1
10.985313416 = 11.795390464 boot/vmlinuz 1
12.688472748 = 13.624143872 boot/vmlinuz-6.14.0-33-generic 2
10.985313416 = 11.795390464 boot/vmlinuz-6.17.0-14-generic 1
12.688472748 = 13.624143872 boot/vmlinuz.old 2
1576.923480988 = 1693.208694784 boot/initrd.img 1
10.336666107 = 11.098910720 boot/initrd.img-6.14.0-33-generic 1
1576.923480988 = 1693.208694784 boot/initrd.img-6.17.0-14-generic 1
10.336666107 = 11.098910720 boot/initrd.img.old 1
===================== sdb2: ls -l /etc/grub.d/ (filtered) ======================
-rwxr-xr-x 1 root root 18123 May 17 2025 10_linux
-rwxr-xr-x 1 root root 43192 May 17 2025 10_linux_zfs
-rwxr-xr-x 1 root root 14513 May 17 2025 20_linux_xen
-rwxr-xr-x 1 root root 786 May 17 2025 25_bli
-rwxr-xr-x 1 root root 13120 May 17 2025 30_os-prober
-rwxr-xr-x 1 root root 1174 May 17 2025 30_uefi-firmware
-rwxr-xr-x 1 root root 722 Jul 11 2025 35_fwupd
-rwxr-xr-x 1 root root 214 May 17 2025 40_custom
-rwxr-xr-x 1 root root 215 May 17 2025 41_custom
Suggested repair: ______________________________________________________________
The default repair of the Boot-Repair utility would reinstall the grub-efi of
sdb2,
using the following options: sdb1/boot/efi
Additional repair would be performed: unhide-bootmenu-10s use-standard-efi-file
Blockers in case of suggested repair: __________________________________________
The current session is in BIOS-compatibility mode. Please disable BIOS-compatibility/CSM/Legacy mode in your UEFI firmware, and use this software from a live-CD (or live-USB) that is compatible with UEFI booting mode. For example, use a live-USB of Boot-Repair-Disk-64bit (www.sourceforge.net/p/boot-repair-cd), after making sure your BIOS is set up to boot USB in EFI mode. This will enable this feature.
Final advice in case of suggested repair: ______________________________________
Please do not forget to make your UEFI firmware boot on the Zorin OS 18 (18) entry (sdb1/efi/****/grub****.efi (**** will be updated in the final message) file) !
The boot of your PC is in BIOS-compatibility/CSM/Legacy mode. You may want to retry after changing it to UEFI mode.
The .iso was most likely burned as EFI (Extensible Firmware Interface), but your system is using MBR (Legacy Master Boot Record)
In your BIOS settings, you can disable Legacy MBR - then load the Live USB, launch Gparted, create an EFI partition of about 512 Megabytes in size
Then reinstall Zorin OS.
Alternatively, you can reburn the .iso as MBR, instead of EFI, leave the MBR set in your BIOS and install Zorin OS using the MBR.
2 Likes
So no matter what a reinstall is required?
Thanks I will try and report back.
Most distros these days state only 300 Mb is needed. I have however started using a conversion tool as Linux uses MebiBytes not MegaBytes.