| From: | Glyn Astill <glynastill(at)yahoo(dot)co(dot)uk> |
|---|---|
| To: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> |
| Cc: | Steve Clark <sclark(at)netwolves(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Perc 3 DC |
| Date: | 2008-11-24 15:06:02 |
| Message-ID: | 193090.19304.qm@web23608.mail.ird.yahoo.com |
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| Thread: | |
| Lists: | pgsql-performance |
--- Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> wrote:
> >
> > 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?
>
Not yet no, but that's a good suggestion and I do intend to give it a
whirl. I get about 27MB/s from raid 1 (10 is about the same) so
hopefully I can up the throughput to the speed of about one disk with
sw raid.
For kicks I did try raid 5 on it; 6.9MB/s made it hard to resist
going to get the hammer, which is still a very attractive option.
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