[...] 
> At that stage the md stuff is only ever accessed on a single 
> node, and there's no problem.

I will use GFS Filesystem with all cluster nodes up and running at the
same time, sharing their disks.
So my problem with the lvm2 mirroring feature still exists. Think I have
to use the expensive and not easy configurable Continuous Access
Solution to mirror directly on SAN fabric level...

Mathias

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