Input/output error during backup

[asmar]

Hi all,

I'm getting the following error on a large VM (60+ GB) when trying to get a backup:

INFO: tar: ./lib64/libproc-3.2.8.so: Read error at byte 0, while reading 8192 bytes: Input/output error
INFO: tar: ./lib64/libdbus-1.so.3.4.0: Read error at byte 0, while reading 5120 bytes: Input/output error
INFO: tar: ./lib64/libpamc.so.0.82.1: Read error at byte 0, while reading 5120 bytes: Input/output error
INFO: Total bytes written: 46260623360 (44GiB, 47MiB/s)
INFO: tar: Exiting with failure status due to previous errors
ERROR: Backup of VM 104 failed - command '(cd /mnt/vzsnap0/private/104;find . '(' -regex '^\.$' ')' -o '(' -type 's' -prune ')' -o -print0|sed 's/\\/\\\\/g'|tar cpf - --totals --sparse --numeric-owner --no-recursion --one-file-system --null -T -|lzop) >/mnt/pve/nasuk1/dump/vzdump-openvz-104-2015_03_07-01_16_52.tar.dat' failed: exit code 2
INFO: Backup job finished with errors
TASK ERROR: job errors

I removed part of the Input/output error but you can get the idea. Does the above error means that I've got issues with the hard drives?

Thanks

 

[dietmar]

Maybe you run out of snapshot space on the LVM snapshot?

 

[asmar]

Thanks Dietmar.

How can I check if I'm actually running out of space on the LVM snapshot?

root@proxmox0:~# vgdisplay
--- Volume group ---
VG Name pve
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 16
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size 1.82 TiB
PE Size 4.00 MiB
Total PE 476029
Alloc PE / Size 471934 / 1.80 TiB
Free PE / Size 4095 / 16.00 GiB
VG UUID gB2OAl-cECT-k1QH-xzfH-KCP0-78U3-M0FuQt

 

[dietmar]

You can try to observe snapshot usage with "lvs" while you run the backup. Also, you can simply set snapshot 'size' in /etc/vzdump.conf (try 4096)

 

[asmar]

Thanks a lot, that setting solved the problem.