Newly installed system with a single VM, and fdisk outputs "The backup GPT table is corrupt, but the primary appears OK, so that will be used."

teeeeee

New Member
Feb 1, 2023
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I have just done a fresh Proxmox installation, and then installed a single VM (Home Assisant using this install script).

My fdisk -l output shows the following error message with regards to the new vm-100-disk-1 partition (which is part of the data LV thin pool):
Code:
The backup GPT table is corrupt, but the primary appears OK, so that will be used.

What is causing this on such a newly installed system, is it anything to worry about, and how can I fix it?

Here is the full fdisk output:
Code:
root@proxmox:~# fdisk -l
Disk /dev/sda: 119.24 GiB, 128035676160 bytes, 250069680 sectors
Disk model: TOSHIBA THNSNF12
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: 49AE1637-198C-4F93-9F85-7975515950C4

Device       Start       End   Sectors   Size Type
/dev/sda1       34      2047      2014  1007K BIOS boot
/dev/sda2     2048   2099199   2097152     1G EFI System
/dev/sda3  2099200 250069646 247970447 118.2G Linux LVM


Disk /dev/mapper/pve-swap: 7.58 GiB, 8141144064 bytes, 15900672 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/pve-root: 16 GiB, 17179869184 bytes, 33554432 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/pve-backups_internal: 16 GiB, 17179869184 bytes, 33554432 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/pve-vm--100--disk--0: 4 MiB, 4194304 bytes, 8192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 65536 bytes


Disk /dev/mapper/pve-vm--100--disk--1: 32 GiB, 34359738368 bytes, 67108864 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 65536 bytes
Disklabel type: gpt
Disk identifier: 42C47CE3-4843-478A-925D-294B2EB17D52

Device                                   Start      End  Sectors  Size Type
/dev/mapper/pve-vm--100--disk--1-part1    2048    67583    65536   32M EFI System
/dev/mapper/pve-vm--100--disk--1-part2   67584   116735    49152   24M Linux filesystem
/dev/mapper/pve-vm--100--disk--1-part3  116736   641023   524288  256M Linux filesystem
/dev/mapper/pve-vm--100--disk--1-part4  641024   690175    49152   24M Linux filesystem
/dev/mapper/pve-vm--100--disk--1-part5  690176  1214463   524288  256M Linux filesystem
/dev/mapper/pve-vm--100--disk--1-part6 1214464  1230847    16384    8M Linux filesystem
/dev/mapper/pve-vm--100--disk--1-part7 1230848  1427455   196608   96M Linux filesystem
/dev/mapper/pve-vm--100--disk--1-part8 1427456 67108830 65681375 31.3G Linux filesystem
The backup GPT table is corrupt, but the primary appears OK, so that will be used.


Disk /dev/sdb: 223.57 GiB, 240057409536 bytes, 468862128 sectors
Disk model:  SA400S37240G   
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 33553920 bytes
Disklabel type: gpt
Disk identifier: F9CB94C0-B87F-4FED-98DE-802144BC90EB

Device     Start       End   Sectors   Size Type
/dev/sdb1  65535 468862094 468796560 223.5G Linux filesystem
root@proxmox:~# lvs
  LV               VG  Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  backups_internal pve -wi-ao---- 16.00g                                                   
  data             pve twi-aotz-- 50.00g             12.83  14.28                           
  root             pve -wi-ao---- 16.00g                                                   
  swap             pve -wi-ao----  7.58g                                                   
  vm-100-disk-0    pve Vwi-aotz--  4.00m data        0.00                                   
  vm-100-disk-1    pve Vwi-aotz-- 32.00g data        20.05
 

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