exit code 255

[shah fahad]

INFO: Error: error at "var/log/maillog": Input/output error (os error 5)
INFO: cleanup temporary 'vzdump' snapshot
Logical volume "snap_vm-122-disk-0_vzdump" successfully removed
ERROR: Backup of VM 122 failed - command '/usr/bin/proxmox-backup-client backup '--crypt-mode=encrypt' '--keyfd=12' pct.conf:/var/tmp/vzdumptmp9544_122/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found '--exclude=/tmp/?*' '--exclude=/var/tmp/?*' '--exclude=/var/run/?*.pid' --backup-type ct --backup-id 122 --backup-time 1713262894 --repository root@pam@10.252.35.100:35-28' failed: exit code 255
INFO: Failed at 2024-04-16 15:23:20
INFO: Backup job finished with errors
TASK ERROR: job errors

please help me how to solve this problem

 

[Dunuin]

INFO: Error: error at "var/log/maillog": Input/output error (os error 5)

Did you check your disks/filesystems why there are IO errors?