[Gllug] OT: Replace old model WD Raptor with new within CentOS 4 RAID system?

[gvim]

On 24/05/2010 19:22, Christopher Hunter wrote:
> On Mon, 2010-05-24 at 18:23 +0100, gvim wrote:
>
>> I'm tempted to proceed with the new WD1500HLFS to make life easier but
>> wondered if anyone else has had experience with RAID5 disks which
>> aren't exactly the same.
>>
>> gvim
>
> Yes.  It didn't work very well, because the seek times became somewhat
> excessive.  We only ran the machine like that for two days, until the
> right drive could be supplied, then all was well.  I don't have any
> quantitative details on the performance impact, but it was substantial.
>
> C.
>
>

I contacted a WD tech and he verified that the disks need to be identical:

"For the RAID to properly work, you need to replace the drive with the same drive model and firmware, otherwise the RAID will be dropping."

gvim


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