Re: URGENT: Need help rebuilding iir RAID5 array with failed drive

On Thu, Jun 26, 2008 at 7:30 AM, Casey Scott <casey@xxxxxxxxxxxxxx> wrote:

----- "Derek Ragona" <derek@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:

At 08:49 AM 6/26/2008, Garrett Cooper wrote:
Hello,
First off sorry for the cross-post. I typically don't do this
but this is an important question, so please bear with me. I'm just
trying to get more eyes on the subject so I can (maybe) get a reply
quicker...
I'm running 8-CURRENT on my machine and it appears that one
of
the disks in my RAID5 array has taken a nose dive (BIOS recognizes
that it exists, but Intel Matrix Manager claims that the disk is an
"Offline Member"). After doing some reading it appears that it's
kaput, so I need to get a replacement disk to fix this one...
That aside, I need to determine how to rebuild the array in a
Unix environment because Intel only provides instructions for how to
use their Windows matrix manager. If anyone can point me to some
links
or provide me with some pointers on how to correct this issue, I'd
owe
you a lot; in fact the next time you come by Santa Cruz, CA I'll
gladly treat you to some beers or something else you might want
:)...
Linux solutions (if there isn't a proper one for FreeBSD) are valid,
as long as the core data remains uncorrupted and I can do what I
need
to from a LiveCD. I'm just scared to boot up OS and have it do some
irrevocable operation like fsck -y and assume parity errors are ok
or
something along those lines (I don't remember if I set rc.conf to
fsck -y and I know I can change that from single-user mode, but I
want
to play things conservatively if at all possible) :\...
Filesystem is UFS2 with softupdates of course.
Point proven that I need to backup my data more often :(...
TIA,
-Garrett

PS If replying on the questions@ list, please CC me as I'm not
subscribed to that list.


Most of the intel RAID functions can be accessed through the BIOS
console
too. It isn't as pretty as the GUI versions but has the same
functions.

The drives are labeled so the RAID controller will know a drive was
replaced. You just need to tell the controller to add it to the array
and
rebuild the array.

I haven't seen an Intel card in a while, but if you see an "initialize"
option, DON'T USE IT. On other cards it exists, and destroys the volume.

Casey

Sean, Casey, and Derek:

Thanks for the replies so far.

Yeah, I stay away from things that say "Initialize", "Delete Array",
etc :). Part of my concern came from the fact that I got a kernel
panic the last time I tried to boot into FreeBSD, but that may have
been because one of my disks was disconnected and the bzero attempt
was polling some address out of range (I was attempting to
troubleshoot the issue at the time).

I'm pretty fed up with Intel's ICH9R interface too so I'm hoping
(crosses fingers) that I'll be able to afford an Adaptec card of some
flavor that's compatible with -CURRENT. For that I'll ask for advice
on current@ later on which card to get...

It looks like my figuring out what to do in solving this issue will
only be solved by grabbing another drive and replacing the dead one.
Oh well, here goes for an RMA...

TIA,
-Garrett
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