From: David Eckhardt <davide+receptionist@cs.cmu.edu>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Seagate Barracuda 7200.7 write cache?
Date: Fri, 16 Jul 2004 17:03:09 +0000 [thread overview]
Message-ID: <cd8u3l$p1r$1@wolfberry.srv.cs.cmu.edu> (raw)
In-Reply-To: <200407131148.29808.boris.maroshev@itcollege.ee>
In article <200407131148.29808.boris.maroshev@itcollege.ee>,
Boris Maryshev <9fans@cse.psu.edu> wrote:
>It isn't enabled by default on all IDE HDDs AFAIK. Some recommend to enable
>it, because you get increased throughput, but some UNIX vendors do not, as
>you can get filesystem corruption in case of power failure. Journalling
>doesn't help here either IIRC.
Sam Hopkins (sah@softcardsystems.com) pointed out to me in
private mail this charming message:
http://www.ussg.iu.edu/hypermail/linux/kernel/0304.1/0450.html
which is a post from a Maxtor employee to the effect that IDE
drives are allowed to arbitrarily re-order writes if the "write
cache" is turned on.
Are fossil & venti ok with this? Should the sd driver try to
turn off the "write cache" feature on IDE drives?
Dave Eckhardt
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Organization: University of Bath Computing Services, UK
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Cc:
--
Dennis Davis, BUCS, University of Bath, Bath, BA2 7AY, UK
D.H.Davis@bath.ac.uk
next prev parent reply other threads:[~2004-07-16 17:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-13 8:25 David Eckhardt
2004-07-13 8:48 ` Boris Maryshev
2004-07-16 17:03 ` David Eckhardt [this message]
2004-07-16 18:52 ` ron minnich
2004-07-16 19:22 ` Brantley Coile
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