Proxmox 3.4 backup warnings: /dev/sdc: read failed after 0 of 4096

[RaidoR]

Hello,

I have a problem with backups in proxmox.

INFO: starting new backup job: vzdump 100 101 105 103 301 107 302 --mailnotification failure --quiet 1 --mailto hooldus@kuvarnet.ee --mode snapshot --compress gzip --storage local
INFO: skip external VMs: 301, 107, 302
INFO: Starting Backup of VM 100 (qemu)
INFO: status = running
INFO: update VM 100: -lock backup
  /dev/sdc: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdc: read failed after 0 of 4096 at 4000786939904: Input/output error
  /dev/sdc: read failed after 0 of 4096 at 4000787021824: Input/output error
  /dev/sdc: read failed after 0 of 4096 at 4096: Input/output error
  /dev/sdc1: read failed after 0 of 4096 at 4000785039360: Input/output error
  /dev/sdc1: read failed after 0 of 4096 at 4000785096704: Input/output error

I dont't have sdc mounted or connected to proxmox:

# blkid
/dev/sda2: UUID="5876-0B7E" TYPE="vfat"
/dev/sda3: UUID="dVKc15-XPX2-7f2A-OHxI-gU0l-h2eZ-uvvQAn" TYPE="LVM2_member"
/dev/mapper/pve-root: UUID="793efeb6-2f65-41dc-8dec-3b4dd6651bd1" TYPE="ext4"
/dev/mapper/pve-swap: UUID="ed99cce9-eae4-446d-ba99-3c3bb48fa51d" TYPE="swap"
/dev/mapper/pve-data: UUID="25798558-fdcc-445b-b8ec-9d23a5eb4ced" TYPE="ext4"
/dev/sdb1: UUID="4ffc3b16-bbed-48e5-9963-121cbddecc64" TYPE="ext4"

I use auto usb to automatically mount and unmount these drives. The drive in bold is supposed to be sdc, but it is only connected during odd months.

# more /etc/auto.usb
#RR 9.09.16 autmaatseks mountimiseks
evenmonth -fstype=auto :/dev/disk/by-uuid/4ffc3b16-bbed-48e5-9963-121cbddecc64
oddmonth -fstype=auto :/dev/disk/by-uuid/3cfc3556-8f5e-477d-98a1-f92c19cbd037

I read from some older threads that it is caused by stale drives. Is there any way without solve this without rebooting?

 

[fireon]

What rights you have on the mountpoint?

 

[RaidoR]

:/mnt/bacula# ls -laht
drwxr-x--- 2 bacula tape 0 Oct 27 15:31 oddmonth

 

[RaidoR]

Any other ideas?