[Linux-cluster] RAID1 in RHCS / RHEL5

[Gordan Bobic]

 I don't think this has anything to do with clustering, but what you are 
 probably looking for is DRBD:
 http://www.drbd.org/

 Gordan

 On Tue, 26 Jul 2011 23:47:03 -0600, Ivan Fetch <ifetch at du.edu> wrote:
> Hello,
>
> I am not finding a lot of docs or commentary about accomplishing
> RAID1 of two shared storage (FC SAN) LUNs, in RHCS. I wlikd like to
> RAID1 two mpath devices (using the device multipathing with RHEL5).
> The mpath devices (mpath0, mpath1) do not match up on all nodes, but 
> I
> don't believe this technically matters, since md uses UUIDs to 
> detects
> it's disk devices.
>
> I could just configure an md device, but it seems like there should
> be a notion of which node owns the md. WHat happens when the active
> node is resyncing a mirror, and that node dies or gets fenced? WHat
> happens if someone tries to operate on the md from the inactive node?
>
> I would very much appreciate hearing from those who are accomplishing
> this, how they did it, gotchas and lessons learned.
>
> Thanks,
>
> - Ivan
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