[Gllug] Discs for a RAID1 pair

[James Roberts]

On 04/07/11 18:22, Martin A. Brooks wrote:
> On Mon, July 4, 2011 17:37, - Tethys wrote:
>> Don't use two of the same type of drive in your array. That avoids bad
>> batch problems where both drives fail simultaneously.
>
> If he's using a proper RAID controller or disk chassis then they're likely
> to be somewhat picky about that kind of thing.

I rather gathered that things were a bit more informal than that, 
otherwise the options stated would not be available :)

> I would bet that I've dealt with more large storage than anyone else on
> the list (2.5P) and the scenario you've said simply does not happen where
> data matters.  Where data matters you're not running RAID1, you're running
> RAID10 where speed is important and a variant of RAID6 where it doesn't.
> And you're running with a hot spare, probably 2.  And you have backups.
> And we all know that it's not a backup until you've restored from it.  And
> we haven't confused "backups" with "near-line copies".

All true, too true...

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