Date: Wed, 18 Jun 2008 22:56:06 -0400 (EDT) From: "Tuc at T-B-O-H.NET" <ml@t-b-o-h.net> To: ryan.coleman@cwis.biz Cc: freebsd-questions@freebsd.org Subject: Re: [freebsd-questions] Re: "Fixing" a RAID Message-ID: <200806190256.m5J2u6Td000286@himinbjorg.tucs-beachin-obx-house.com> In-Reply-To: <2854.71.63.150.244.1213842322.squirrel@www.pictureprints.net>
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> > > > Ryan Coleman wrote: > >>> Ryan Coleman wrote: > > > > Oh, I completely forgot to ask... > > > > Does the RAID still operate even though one disk is bad? > > > > After all, that is the purpose of RAID-5. stripe, with parity. One > > fails, the other two (or N) keep right on going... > > > > Or, is it a RAID-5 card that you put into operation as a RAID-0 span? > > > > If the latter is the case, good luck ;) > > No, I'm not that stupid. :) My old job, we had the big LaCie drives and > one of the 4 250Gs in it would fail and they were f*ed. I went to replace > the drive right away so I wouldn't be in that situation. > > When I went to rebuild in the BIOS it failed at 2%, no matter what 250G > drive I put in to fill the spot. > I had that happen on a 4 disk (36G each) raid-5 (I forget the controller). No matter what disk I put in to replace a failed one, it wouldn't "take". 3 drives, exact model, different production dates... None took. I futzed and futzed and finally decided to declare the cage bad and think of backout procedures. About 2 hours after I had set another machine up to take its place, it started giving spurious errors and fell over. I pulled the machine out of the datacenter, cleared out the raid config, and went to rebuild with just the 3 drives. Wouldn't build a fresh raid-5 from just the 3 disks. After the "Which one of these things is not like the other", I found that apparently one of the disks still was working, but causing heck if I put another disk in the slot next to it. A year later, and I finally decided to buy a few more disks off ebay to see if my final theory is right. I win (hopefully) the auction in 5 days... If the cage really is bad, I previously sourced a new case/cage, and decided even though its a 4G Dual Xenon system I probably could get a new system cheaper thats faster. Tuc
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