[Linux-cluster] Mirrored Clustered File Systems

[John Leach]

On Sun, 2009-02-08 at 10:30 -0800, Dave Craska wrote:
> 
> I'm trying to set up a clustered mirror file system, running under RH 5.2.
> I've been able to run the pvcreate and the vgcreate, but when I try and run the lvcreate I run into some issues:
> 
> [root at rdgasoem1p ~]# lvcreate -L 512MB -m1 --corelog -n cvg00_log cvg00
>   Error locking on node rdgasoem1p.am.boehringer.com: device-mapper: reload ioctl failed: Invalid argument
>   Error locking on node rdgasoem2p.am.boehringer.com: device-mapper: reload ioctl failed: Invalid argument
>   Error locking on node rdgasoem1p.am.boehringer.com: device-mapper: reload ioctl failed: Invalid argument
>   Aborting. Failed to activate new LV to wipe the start of it.

That cryptic error message in this context means that the dm-cmirror
kernel module isn't available on those node.

dm-cmirror isn't available in RHEL 5.2.  It's available in RHEL 4 iirc,
and it's in RH 5.3 now:

https://rhn.redhat.com/errata/RHEA-2009-0158.html

John.
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