[linux-lvm] clusteredVG+mirroredLV

Jayson Vantuyl jvantuyl at engineyard.com
Wed Apr 25 08:16:00 UTC 2007

Mirroring (and snapshotting) does not currently work with clustered  
VGs.  This is because cmirror (and csnap) is not released yet.

On Apr 25, 2007, at 2:48 AM, Michael Eisenkölbl wrote:

> Hi all,
> i want to create a two node cluster with three iSCSI devices.
> the iSCSI devices should be mirrored (2mirror+1log) to be more secure.
> I am going to configure 3 PVs and after a clustered volume group,  
> so this is no problem.
> but when I am trying to create the mirrored logical volume (on this  
> clusteredVG), I got the following error message:
> lvcreate command failed.
> Command attempted: "/usr/sbin/lvcreate -n mirrorLV -l 6 -m1  
> mirrorVG /dev/sde1 /dev/sdb1 /dev/sdc1" - System Error Message:    
> Error locking on node server4: Internal lvm error, check syslog
> Aborting. Failed to activate mirror log. Remove new LVs and retry.
> Failed to create mirror log.
> I deleted everything and retried it, but everytime the same error.
> cluster is working good. clvmd is also started with locking mode 2.
> if I try to create a normal VG with a mirrored LV everythings fine.
> if I try to create a clustered VG with a normal LV everythings fine.
> but not a clustered VG with a mirrored LV...... why?
> maybe somebody can help me with this situation.
> kind regards
> Michael
> _______________________________________________
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Jayson Vantuyl
Systems Architect
Engine Yard
jvantuyl at engineyard.com

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