[5397] in linux-scsi channel archive
Re: SCSI write caching
daemon@ATHENA.MIT.EDU (Marc SCHAEFER)
Sat Dec 12 15:53:50 1998
To: linux-scsi@vger.rutgers.edu
From: Marc SCHAEFER <schaefer@alphanet.ch>
Date: 12 Dec 1998 09:43:08 +0100
C S Hendrix <shendrix@escape.widomaker.com> wrote:
> The tests were actually faster with write cache turned off. I'm not
> sure I really expected it to be faster, but I was surprised that
> cache slowed things down.
The write cache must be taken from somewhere, ie less read cache.
Caching is best when I/O size (on SCSI bus) matches one of the
cache segment length.
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