Re: [PERFORM] Arguments Pro/Contra Software Raid

From: Douglas McNaught <doug(at)mcnaught(dot)org>
To: Scott Marlowe <smarlowe(at)g2switchworks(dot)com>
Cc: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Steve Atkins <steve(at)blighty(dot)com>, PostgreSQL General <pgsql-general(at)postgresql(dot)org>, "Pgsql-Performance ((E-mail))" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: [PERFORM] Arguments Pro/Contra Software Raid
Date: 2006-05-10 14:51:22
Message-ID: 87r732ndat.fsf@suzuka.mcnaught.org
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Scott Marlowe <smarlowe(at)g2switchworks(dot)com> writes:

> On Tue, 2006-05-09 at 20:02, Bruce Momjian wrote:

>> You do if the controller thinks the data is already on the drives and
>> removes it from its cache.
>
> Bruce, re-read what I wrote. The escalades tell the drives to TURN OFF
> THEIR OWN CACHE.

Some ATA drives would lie about that too IIRC. Hopefully they've
stopped doing it in the SATA era.

-Doug

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