Getting started the hard way with RAID

Kevin O'Gorman kogorman at
Fri Dec 2 02:56:30 UTC 2011

I'm in the late stages of recovering a broken system.  The original
had a hardware raid controller managing a mirror set that contained
some stuff that was not backed up.  Fortunately, one reason it wasn't
backed up is that it wasn't really vital.  Nevertheless, I'd like to
get at that stuff.

The hard part is that I no longer have that RAID controller, just the
two drives.  The controller was a 64-bit PCI card, and the new mobo
cannot handle it.  The mirror set does not show up at all in fdisk or
gparted, though it's pretty obvious where it is.  Early in the
recovery process, some other piece of software told me it saw the
mirror set, but I don't remember which software that was.

I left the drives uncabled since then.  Now I have them online again
and I don't know where to start.  They seem healthy, and still have
the two non-RAID partitions they're supposed to have.

Is it possible for LVM to see that data?
Any idea what tools I would need to finish the recovery?  Or am I just SOL?

Kevin O'Gorman, PhD

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