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Date: Mon, 24 Nov 2008 07:52:32 -0700
From: "Scott Marlowe" <scott.marlowe@gmail.com>
To: glynastill@yahoo.co.uk
Subject: Re: Perc 3 DC
Cc: "Steve Clark" <sclark@netwolves.com>, pgsql-performance@postgresql.org
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On Mon, Nov 24, 2008 at 7:49 AM, Glyn Astill <glynastill@yahoo.co.uk> wrote:
> --- On Mon, 24/11/08, Steve Clark <sclark@netwolves.com> wrote:
>
>> > Yeah the battery's on it, that and the 128Mb is
>> really the only reason I thought I'd give it a whirl.
>> >
>> >
>> Is the battery  functioning? We found that the unit had to
>> be on and charged before write back caching
>> would work.
>
> Yeah the battery is on there, and in the BIOS it says it's "PRESENT" and the status is "GOOD".

If I remember correctly, older LSI cards had pretty poor performance
in RAID 1+0 (or any layered RAID really).  Have you tried setting up
RAID-1 pairs on the card and then striping them with the OS?