Backup warnings

[ejmerkel]

I noticed the following error in bold when doing backups on a proxmox 2.1 server.


vzdump 101 100 --quiet 1 --mode snapshot --compress lzo --storage backups
101: Oct 07 01:00:01 INFO: Starting Backup of VM 101 (qemu)
101: Oct 07 01:00:01 INFO: status = running
101: Oct 07 01:00:02 INFO: backup mode: snapshot101: Oct 07 01:00:02 INFO: ionice priority: 7
101: Oct 07 01:00:02 INFO: /dev/sde: read failed after 0 of 4096 at 0: Input/output error
101: Oct 07 01:00:02 INFO: /dev/sde: read failed after 0 of 4096 at 34359672832: Input/output error
101: Oct 07 01:00:02 INFO: /dev/sde: read failed after 0 of 4096 at 34359730176: Input/output error
101: Oct 07 01:00:02 INFO: /dev/sde: read failed after 0 of 4096 at 4096: Input/output error
101: Oct 07 01:00:02 INFO: Logical volume "vzsnap-dc03r09ds30-0" created
101: Oct 07 01:00:02 INFO: creating archive '/backup/dump/vzdump-qemu-101-2012_10_07-01_00_01.tar.lzo'
101: Oct 07 01:00:02 INFO: adding '/backup/dump/vzdump-qemu-101-2012_10_07-01_00_01.tmp/qemu-server.conf' to archive ('qemu-server.conf')
101: Oct 07 01:00:02 INFO: adding '/dev/lvm_local_storage/vzsnap-dc03r09ds30-0' to archive ('vm-disk-virtio0.raw')
101: Oct 07 01:26:40 INFO: Total bytes written: 268435458560 (160.20 MiB/s)
101: Oct 07 01:26:40 INFO: archive file size: 7.03GB101: Oct 07 01:26:40 INFO: delete old backup '/backup/dump/vzdump-qemu-101-2012_09_30-01_00_01.tar.lzo'
101: Oct 07 01:26:41 INFO: Finished Backup of VM 101 (00:26:40)

It says the backup completes successfully. However I am wondering what is causing this error because from what I see there is no /dev/sde on this system if I look in fstab and fdisk -l. If I do a pvdisplay I get this error as well. Basically this system has two RAID10 drives /dev/sda which has the pve lvm storage and /dev/sdb which has a local lvm storage group for vm's on it.

# pvdisplay
/dev/sde: read failed after 0 of 4096 at 0: Input/output error
/dev/sde: read failed after 0 of 4096 at 34359672832: Input/output error
/dev/sde: read failed after 0 of 4096 at 34359730176: Input/output error
/dev/sde: read failed after 0 of 4096 at 4096: Input/output error
--- Physical volume ---
PV Name /dev/sdb1
VG Name lvm_local_storage
PV Size 3.54 TiB / not usable 2.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 927999
Free PE 567039
Allocated PE 360960
PV UUID wADqhN-6qjj-UswV-QbE4-P1xd-OwSD-L2MJ0M


--- Physical volume ---
PV Name /dev/sda2
VG Name pve
PV Size 99.50 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 25471
Free PE 3199
Allocated PE 22272
PV UUID y11t8y-j5Sf-T3ph-HdGC-P1XY-XvOF-fucBp1


I am also seeing similar errors on two other similar systems so I am wondering if this is just a bug and can be ignored? Anyone have any ideas what is causing this?

Thanks,
Eric

 

[dietmar]

Do you use iscsi?

 

[hotwired007]

i get a similar warning if i removed an iSCSI share and didnt reboot the host before actually diabling the iSCSI share.

 

[udo]

i get a similar warning if i removed an iSCSI share and didnt reboot the host before actually diabling the iSCSI share.

Hi,
you don't need an reboot - you can also remove such staled devices on the fly:

# e.g.
pvscan 
  /dev/dm-29: read failed after 0 of 4096 at 10737352704: IO Error
  /dev/dm-29: read failed after 0 of 4096 at 10737410048:  IO Error
  /dev/dm-29: read failed after 0 of 4096 at 0:  IO Error
  /dev/dm-29: read failed after 0 of 4096 at 4096:  IO Error
  /dev/dm-29: read failed after 0 of 4096 at 0: IO Error
  ...

# deactivating by
ls -l /dev/dm-29
brw-rw---- 1 root disk [B]252, 29[/B]  2. Feb 13:52 /dev/dm-29

dmsetup info
#and searching the device with (in this case) 252, 29:
Name:              iscsi--test--vg-vm--111--disk--1
State:             ACTIVE
Read Ahead:        256
Tables present:    LIVE
Open count:        0
Event number:      0
Major, minor:      252, 29
Number of targets: 1
UUID: LVM-gGZnXw676l3Rczm2VupXhPvx5ngFOvEPrAciaNcdmMT0oYpxU3Rz0QELcBnvCvtb

# remove device with
dmsetup remove iscsi--test--vg-vm--111--disk--1

Voila, no errors during pvs without reboot.

Udo