Date: Mon, 09 Jul 2001 17:02:55 +1200 From: Craig Harding <crh@outpost.co.nz> To: Brett Glass <brett@lariat.org> Cc: chat@FreeBSD.ORG Subject: Re: MS has quality programmers and OS design? Stop smokingcrack! Message-ID: <3B493AFE.24377793@outpost.co.nz> References: <4.3.2.7.2.20010708214340.046dd8e0@localhost>
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Brett Glass wrote:
> At 07:30 PM 7/8/2001, Craig Harding wrote:
>
> >In other words, Windows doesn't actually do anything to ensure that a HD
> >write cache is written to disk before restarting,
>
> To be fair, no one can except by turning off lazy writes. This is what
> Softupdates does in FreeBSD, and it does incur a performance hit
> (though it's worth it, IMHO).
The tech docs I downloaded from Maxtor's website for this drive (a
Quantum Fireball Plus AS 20GB) list a "flush cache" command which would
presumably do the trick on a shutdown. Is this not a standard ATA
command?
> FLUSH CACHE
> COMMAND CODE – E7h
> DESCRIPTION – The FLUSH CACHE command allows the HOST to request the
> device to flush (empty) the write cache. When the host issues this
> command, the drives sets BSY and proceeds to write all the cached data
> to the media.
-- C.
--
Craig Harding crh@outpost.co.nz ICQ# 26701833
Outpost Digital Media Ltd http://www.outpost.co.nz
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