Re: RAID Controller Failover

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Article #526

#526

From: Jake Roersma
Date: Sat, 08 Nov 2003 16:43

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On Sat, 08 Nov 2003 18:45:17 +0300, Maxim S. Shatskih wrote:

>     If you want to save money on disks - yes.
>     If the disk drive cost is neglectable for you - then RAID1+0 is better by
> far.
> 
>     RAID4 and RAID5 are very slow on writes.

I've noticed as the controllers get more advanced that the caching and
other alogrithms used minimize the actual write times that the host
system sees.  My tests on the recent HP equipment show that the difference
in write times between RAID-1 and RAID-5 are within 1MB of each other.  I
have a hard time believing that anyone would be driven away from RAID-5
due to performance factors on high-end equipment.  I have the bonnie++
stats if you'd like to see them.

- Jake

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Date: Sat, 08 Nov 2003 16:43:00 GMT
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From: Jake Roersma <jaker@IHATESPAMcopiosus.net>
Subject: Re: RAID Controller Failover
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