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Re: The backup GPT table is corrupt



On 2025-08-13 00:33, David Christensen wrote:
On 8/12/25 01:22, mick.crane wrote:
The BIOS is like 12 years old.
The boot list option has UEFI checked


Okay.


Please check and post the Setup settings for the disk drive.


Please run and post:

# gdisk -l /dev/sda


root@courgette:/home/mick# gdisk -l /dev/sda
GPT fdisk (gdisk) version 1.0.9

Caution: invalid backup GPT header, but valid main header; regenerating
backup header from main header.

Warning! One or more CRCs don't match. You should repair the disk!
Main header: OK
Backup header: ERROR
Main partition table: OK
Backup partition table: OK

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: damaged

****************************************************************************
Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
****************************************************************************
Disk /dev/sda: 234441648 sectors, 111.8 GiB
Model: V Series SATA SS
Sector size (logical/physical): 512/512 bytes
Disk identifier (GUID): CEC0C0B6-A933-426A-921B-04BDA99E808B
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 234441614
Partitions will be aligned on 2048-sector boundaries
Total free space is 2925 sectors (1.4 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048         1050623   512.0 MiB   EF00
   2         1050624       232441855   110.3 GiB   8300
   3       232441856       234440703   976.0 MiB   8200
root@courgette:/home/mick#

There's just the one OS on this disk. Possibly my changing the disk from MBR to GPT caused some error. I will take everything to bits but I am doing important shit-posting work.
mick


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