Re: dissimilar drives in Raid10 , does it make difference ? - Mailing list pgsql-performance

From Matthew Wakeling
Subject Re: dissimilar drives in Raid10 , does it make difference ?
Date
Msg-id alpine.DEB.2.00.0902131444160.3995@aragorn.flymine.org
Whole thread Raw
In response to dissimilar drives in Raid10 , does it make difference ?  (Rajesh Kumar Mallah <mallah.rajesh@gmail.com>)
Responses Re: dissimilar drives in Raid10 , does it make difference ?  (Craig Ringer <craig@postnewspapers.com.au>)
List pgsql-performance
On Fri, 13 Feb 2009, Rajesh Kumar Mallah wrote:
> I have received Dell Poweredge 2950 MIII with 2 kind of
> drives. I cant' make out the reason behind it , does it
> make any difference in long run or in performance
> the drives are similar in overall characteristics but does
> the minor differences if will cause any problem ?

As long as the drives are approximately the same capacity and speed, then
no, it will not cause problems.

In fact, it is recommended that two different types of drives are used.
That way, if there's a mass failure of a whole batch of drives from one
particular vendor, you don't lose all your data.

Matthew

--
"Programming today is a race between software engineers striving to build
 bigger and better idiot-proof programs, and the Universe trying to produce
 bigger and better idiots. So far, the Universe is winning."  -- Rich Cook

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