Well, we got lucky and it is back in operation. There are 14 drive bays, so an exhaustive search of the permutations would be time-prohibitive. I'll label the drives from now on when I'm doing something like this!<br>
<br><div class="gmail_quote">On Mon, Jun 7, 2010 at 8:34 AM, Trevor Cordes <span dir="ltr"><<a href="mailto:trevor@tecnopolis.ca">trevor@tecnopolis.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">On 2010-06-04 Kevin McGregor wrote:<br>
> I've got a HP ProLiant server running OpenFiler, and due to errors on<br>
> my part, the SCSI drives got rearranged. Now the HP 6400 RAID<br>
> controller complains that an "unsupported drive rearrangement has<br>
> been attempted", and the logical volume is missing. Is there any way<br>
> to recover the correct order of drives in the drive bay?<br>
<br>
</div>Very very strange that the physical ordering is important! If Adam<br>
hasn't already helped :-) ... here's my 2c:<br>
<br>
How many drives are we talking? If it's not large, there should be<br>
only so many permutations and if you try every single one, one should<br>
just magically work.<br>
<div class="im"><br>
> Suggestions, aside from "use software RAID next time"?<br>
<br>
</div>If the data was super important, you could hook up the drives in a<br>
non-raid environment and do so byte-level peeking to try to figure out<br>
the data arrangement (what raid level was it?), stripe sizes, etc.<br>
That should be possible and from then a simple perl program could<br>
extract all the data at the block level in the right order and dump to<br>
another huge disk or array. I think I could probably pull it off<br>
unless the controller is doing something really wacky. I've done<br>
similar things in the past during raid disasters of my own (years ago<br>
when I learned (the hard way) the value of RAID6 over RAID5).<br>
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