[linux-lvm] Removing snapshot often fails

[Danilo Godec <danilo.godec@agenda.si>]

Hello,

I have an OpenSuSE 11.4 based Xen server. I use LVM as the 'store' for 
VM 's and I'm trying to make use of snapshots for backup.

However I discovered that often removing a snapshot fails - 
unfortunately it's quite unpredictable, as sometimes it works on next 
try but sometimes it fails 20 times in a row - making it very unpleasant 
for scripting...

Even when it succeeds it give's me a message 'give up on open_count' - 
and I couldn't quite find what it means.

Here's what I've been trying by hand:

> # lvcreate -s /dev/vm_store/test_vm1 -n "backup_test_vm1" -l 100%ORIGIN
>   Logical volume "backup_test_vm1" created
> # lvremove -f /dev/vm_store/backup_test_vm1
>   give up on open_count
>   Logical volume "backup_test_vm1" successfully removed
> # lvcreate -s /dev/vm_store/test_vm1 -n "backup_test_vm1" -l 100%ORIGIN
>   Logical volume "backup_test_vm1" created
> # lvremove -f /dev/vm_store/backup_test_vm1
>   give up on open_count
>   Logical volume "backup_test_vm1" successfully removed
> # lvcreate -s /dev/vm_store/test_vm1 -n "backup_test_vm1" -l 100%ORIGIN
>   Logical volume "backup_test_vm1" created
> # lvremove -f /dev/vm_store/backup_test_vm1
>   Can't remove open logical volume "backup_test_vm1"

Am I doing something wrong?

Is this 'expected' and should I just keep re-trying in a loop until it 
succeeds?

  Thanks, Danilo




-- 
Danilo Godec, sistemska podpora / system administration

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