At 23:49 5-6-2002 +0200, utz lehmann wrote:
Hi
Florin Andrei [florin@xxxxxxx] wrote:
> On Wed, 2002-06-05 at 13:04, Thor Lancelot Simon wrote:
> >
> > More importantly, you don't *want* to use readahead because it will waste
> > valuable cache space on the controller that could be used to cache small
> > writes.
>
> How safe is it to enable caching for writes on the controller (if you
> don't have a battery on it)?
> I mean, i configured my Mylex with "Write Through" for data-safety
> reasons, even though the other option ("Write Back") could offer
> improved performance.
It's not (really) safe, see
http://oss.sgi.com/projects/xfs/mail_archive/200205/msg00510.html
He is talking about a add-in card with it's own battery backup. The mail
you referenced is about a externel raid device without a battery backup.
Cheers
--
Seth
It might just be your lucky day, if you only knew.
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