[linux-lvm] Cancelling snapshot merge
zkabelac at redhat.com
Tue Feb 11 10:06:27 UTC 2014
Dne 10.2.2014 14:14, Alexander Meshcheryakov napsal(a):
> I had created snapshot of my /var logical volume a while ago and recently It
> occured to me that I don't need saved state anymore and I would like to
> reclaim disk space. But I have issued wrong lvconvert --merge command by
> mistake instead of proper lvremove.
> $ sudo lvconvert --merge VolGroup00/var_snap0
> Can't merge over open origin volume
> Merging of snapshot var_snap0 will start next activation.
> I have figured out at this point that I made mistake. Luckily merge is
> postponed as volume is used (mounted) now. But how do I prevent merge from
> running upon next reboot? Here is what I have tried:
> $ sudo lvremove VolGroup00/var_snap0
> Can't remove merging snapshot logical volume "var_snap0"
> $ sudo lvchange -an VolGroup00/var_snap0
> Change of snapshot var_snap0 will also change its origin LogVol01. Proceed?
> [y/n]: n
> Logical volume var_snap0 not changed.
> I even could not create snapshot of current state to roll back to it after merge
> $ sudo lvcreate --size 2G --snapshot -n var_snap1 /dev/mapper/VolGroup00-LogVol01
> Snapshots of an origin that has a merging snapshot is not supported
> Is there a way to cancel postponed snapshot merge?
vgcfgrestore - you could go via archive to the previous state of metadata.
There is no support for merge aborting - since it might have other 'side'
effects on metadata.
If you know what you are doing - vgcfgrestore is your rescue tool.
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