Softraid Multi-dirve Failure

[Stephen]

heck you can get highpoint cards for not to bad an amount that will do raid 60

they have some cheaper ones includeing a 4 port SAS pci-e 4x for 250.

Linux raid is ok, but it does not recover well if it is invovled with
your boot partition. in our storage server we are useing a 2 port raid
card and then 6 onboard ports with linux mraid.

On Fri, Jan 9, 2009 at 2:49 PM, Lisa Kachold <lisakachold at obnosis.com> wrote:
> HEAT is the most devastating culprit to drives, other than extensive
> read/writes, and power sparks, as Eric suggested below.
>
> I suggest you order a nice controller card.  3Ware.com has cheap ones.  You
> can even do terabyte RAID for say a nice GreenPlum cluster in an old
> AmericanMicro.com 4 U server with 8 drives!
>
> LVM over hardware RAID is a fine solution, especially with good conditioning
> and temperature protections.
>
> You just pop out the drive (RAID 1+0 [disk is cheap]) and replace and
> rebuild hot.
>
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> (503)754-4452
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> Date: Fri, 9 Jan 2009 14:30:27 -0700
> From: eric.cope at gmail.com
> To: plug-discuss at lists.plug.phoenix.az.us
> Subject: Re: Softraid Multi-dirve Failure
>
> This is more in regards to your last paragraph. Where are you storing your
> hard drives? What type of environment are they subjected to?
>
> On Fri, Jan 9, 2009 at 2:25 PM, Joe Fleming <joe at selectitaly.com> wrote:
>
> Hey all, I have a Debian box that was acting as a 4 drive RAID-5 mdadm
> softraid server. I heard one of the drives making strange noises but mdstat
> reported no problems with any of the drives. I decided to copy the data off
> the array so I had a backup before I tried to figure out which drive it was.
> Unfortunately, in the middle of copying said data, 2 of the drives dropped
> out at the same time. Since RAID-5 is only tolerant to one failure at a
> time, basically the whole array is hosed now. I've had drives drop out on me
> before, but never 2 at once. Sigh.
>
> I tried to Google a little about dealing with multi-drive failures with
> mdadm, but I couldn't find much in my initial looking. I'm going to keep
> digging, but I thought I'd post a question to the group and see what
> happens. So, is there a way to tell mdadm to "unmark" one of the 2 drives as
> failed and try to bring up the array again WITHOUT rebuilding it? I really
> don't think both of the drives failed on me simultaneously and I'd like to
> try to return 1 of the 2 to the array and test my theory. If I can get the
> array back up, I can either keep trying to copy data off it or add a new
> replacement and try to rebuild. I'm pretty novice with mdadm thought I don't
> see an option that will let me do what I want. Can anyone offer me some
> advice or point me in the right direction..... or am I just SOL?
>
> As a side note, why can't hard drive manufacturers make drives that last
> anymore? I've had like 5 drives fail on me in the last year... WD, Seagate,
> Hitachi, they all suck equally! I can't find any that last for any
> reasonable amount of time, and all the warranties leave you with reman'd
> drives which fail even more rapidly, some even show up DOA. Plus, I'm not
> sending my unencrypted data off to some random place! Sorry for venting,
> just a little ticked off at all of this. Thanks in advance for any help.
>
> -Joe
>
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-- 
A mouse trap, placed on top of your alarm clock, will prevent you from
rolling over and going back to sleep after you hit the snooze button.

Stephen