Re: [GENERAL] Arguments Pro/Contra Software Raid

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От Scott Marlowe
Тема Re: [GENERAL] Arguments Pro/Contra Software Raid
Дата
Msg-id 1147273799.9755.20.camel@state.g2switchworks.com
обсуждение исходный текст
Ответ на Re: [GENERAL] Arguments Pro/Contra Software Raid  (Douglas McNaught <doug@mcnaught.org>)
Список pgsql-performance
On Wed, 2006-05-10 at 09:51, Douglas McNaught wrote:
> Scott Marlowe <smarlowe@g2switchworks.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.

Ugh.  Now that would make for a particularly awful bit of firmware
implementation.  I'd think that if I found a SATA drive doing that I'd
be likely to strike the manufacturer off of the list for possible future
purchases...

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