[Ocfs2-users] OCFS2 and Snapshots

[Sunil Mushran]

OCFS2 relies on the uniqueness of the uuid for it to distinguish between
different volumes. One cannot mount two volumes having the same uuid
on the same node. Infact, one should not do that across the cluster too, 
i.e.,
mount two different physical volumes having the same identical uuid.

If you have to mirror and mount, mount it on another node in a different 
cluster.
It could be a 1 node cluster too.

Andre Brinkmann wrote:
> Hello,
>
> I am trying to couple OCFS2 with a storage virtualization environment to 
> use features like mirroring and snapshots. Unfortunately it seems to be 
> impossible for ocfs2console (and for mount.ocfs2) to distinguish between 
> the original volume and its snapshot and ocffs2 stops the mount-process 
> with the following messages:
>
> Jul 20 17:23:54 sinalco kernel: (5028,1):ocfs2_initialize_super:1395 
> max_slots for this device: 4
> Jul 20 17:23:54 sinalco kernel: (5028,0):ocfs2_fill_super:642 ERROR: 
> Unable to create per-mount debugfs root.
>
> Is it possible too change the uuid and other relevant parameters?
>
> Best Regards
>
> André
>
>