On 8/8/26 05:07, mick.crane wrote:
> root@melon:~# fdisk -l
> ...
> The backup GPT table is corrupt, but the primary appears OK, so that
> will be used.
>
>
> Disk /dev/sda: 2.73 TiB, 3000592982016 bytes, 5860533168 sectors
> Disk model: ST3000NM0005-1V4
> 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: gpt
> Disk identifier: F6A1B30E-8495-8F4B-B53D-4D80D5C28C81
>
> Device Start End Sectors Size Type
> /dev/sda1 2048 5860532223 5860530176 2.7T Linux filesystem>
> So I'm going to assume that the message,
> "The backup GPT table is corrupt, but the primary appears OK, so that
> will be used."
> Is about the 3TB drive and it's nothing to do with problem cloning the
> OS disk.
I agree -- fdisk(8) is printing the error message before listing the 3
TB HDD partition table.
I had a 3 TB HDD that was producing the same error. I fixed it with
gdisk(8):
2021-10-29 22:22:16 root@dipsy ~/hardware/seagate/ST3000DM001-REDACTED
# gdisk /dev/disk/by-id/ata-ST3000DM001-REDACTED
GPT fdisk (gdisk) version 1.0.3
Caution: invalid backup GPT header, but valid main header; regenerating
backup header from main header.
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.
****************************************************************************
Command (? for help): p
Disk /dev/disk/by-id/ata-ST3000DM001-REDACTED: 5860533168 sectors, 2.7 TiB
Sector size (logical/physical): 512/4096 bytes
Disk identifier (GUID): REDACTED
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 5860533134
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 5860532223 2.7 TiB A504 z3000a
Command (? for help): v
No problems found. 2925 free sectors (1.4 MiB) available in 2
segments, the largest of which is 2014 (1007.0 KiB) in size.
Command (? for help): w
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!
Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to
/dev/disk/by-id/ata-ST3000DM001-REDACTED.
The operation has completed successfully.
David
