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Re: databases and RAID ...

From: Ragnar Kjørstad <postgres(at)ragnark(dot)vestdata(dot)no>
To: Peter Eisentraut <peter_e(at)gmx(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,pgsql-admin <pgsql-admin(at)postgresql(dot)org>
Subject: Re: databases and RAID ...
Date: 2002-05-25 19:38:39
Message-ID: 20020525213839.A24769@vestdata.no (view raw or flat)
Thread:
Lists: pgsql-admin
On Sat, May 25, 2002 at 09:29:01PM +0200, Peter Eisentraut wrote:
> 0  Nonredundant
> 1  Mirrored
> 2  Memory-style ECC
> 3  Bit-interleaved parity
> 4  Block-interleaved parity
> 5  Block-interleaved distributed parity
> [Hennessy & Patterson]
> 
> There are also other levels.  One poster talked about RAID 10 which
> appears to be a mirrored RAID 5.

No, RAID 10 is RAID 1 over RAID 0 (mirrored stripes). Mirrored RAID 5
would RAID 1 over RAID 5 or RAID 15 for short.


-- 
Ragnar Kjorstad

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