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Re: [zfs-discuss] ZFS Hardware Check, OS X Compatibility, NEWBIE!!

Subject: Re: [zfs-discuss] ZFS Hardware Check, OS X Compatibility, NEWBIE!!
From: Keith Bierman
Date: Wed, 4 Jun 2008 11:04:46 -0600
On Jun 4, 2008, at 10:47 AM, Bill Sommerfeld wrote:

>
> On Wed, 2008-06-04 at 11:52 -0400, Bill McGonigle wrote:
>> but we got one server in
>> where 4 of the 8 drives failed in the first two months, at which
>> point we called Seagate and they were happy to swap out all 8 drives
>> for us.   I suspect a bad lot, and even found some other complaints
>> about the lot on Google.
>
> Problems like that seem to pop up with disturbing regularity, and have
> done so for decades.  (Anyone else remember the DEC RA81 glue  
> problem in
> around 1985-1986?)
>
> I've thought for some time that a good way to defend against the "bad
> lot" problem (if you can manage it) is to buy half of your disks from
> each of two manufacturers and then set up mirror pairs containing one
> disk of each model...
>
>


I think it's a bit more common to arrange to have same vendor parts,  
but different lots. There are still lots of potential correlations,  
shared chassis, shared power, etc. mean shared vibration, shared  
environment, and shared human error sources ;>



-- 
Keith H. Bierman   khbkhb@xxxxxxxxx      | AIM kbiermank
5430 Nassau Circle East                  |
Cherry Hills Village, CO 80113           | 303-997-2749
<speaking for myself*> Copyright 2008




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