RAID on RedHat 3 ES

[Steve Phillips]

Software RAID comes with a preformance hit that with todays processors you 
probably will never notice.

RAID1 would be ok, if you are after rock solid redundancy then purchase 
another drive as a hot spare (and if your really keen, try to ensure that 
the drives are nto from teh same production batch)

comments like "dont know if it is really effective" are kinda wishy washy, 
effective against what ? was he saying that a single drive system would 
have greater redundancy than a mirrored setup ? what sort of effect was he 
commenting on ?

the preformance hit you will see will also depend on how many users and 
how busy you expect the server to be - also, buying 5400rpm drives will 
probably not help much, try and get reasonably fast drives with a 
reasonable ammount of cache ram.

if you are after reliability only then there is no point to stripe 
(infact, some people claim that software stripes actually slow things down 
over say - RAID 10)


-- 
Steve.

On Thu, 19 Aug 2004, kenwardc wrote:

> Hi All
>
> Someone said to me today they didn't know whether RAID on Linux was
> very effective. Can someone tell me whether it's still worth RAIDing
> drives on Linux? I'm building a new mail server and I wanted to put in
> RAID 1 just in case of problems with drives etc. down the line. Any
> advice appreciated.
>
> Also, provided the answer to the question is YES, is RAID 1 the best
> for a mail server or should I be looking at striping? I'm obviously
> not looking for the greatest speed but want absolutely reliable
> redundancy.
>
> Regards
> Chris
>
>
>
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