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Date: Tue, 8 Apr 2003 22:43:25 +0200
From: Wilko Bulte <wkb@freebie.xs4all.nl>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>,
	Dag-Erling Smorgrav <des@ofug.org>, Nate Lawson <nate@root.org>,
	Alexander Leidinger <Alexander@Leidinger.net>,
	sos@spider.deepcore.dk, cvs-src@FreeBSD.org,
	src-committers@FreeBSD.org, cvs-all@FreeBSD.org, sos@FreeBSD.org
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Subject: Re: cvs commit: src/sys/dev/ata ata-all.c ata-all.h
	ata-chipset.cata-dma.c ata-pci.c ata-pci.h
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On Tue, Apr 08, 2003 at 10:23:08PM +0200, Ollivier Robert wrote:
> According to Poul-Henning Kamp:
> >    Tagged queueing:
> > 	Ability to reduce transaction latency by sending more than one
> > 	request to the drive at a time.  The request may be handled out
> > 	of order by the drive.
> > 	(A good thing!)
> 
> Except for softupdates which rely on its own ordering of writes...

SCSI has a Force Media Access bit somewhere that is supposed to ensure the
written data has indeed hit the platter. ENOCLUE on ATA.

-- 
|   / o / /_  _   		wilko@FreeBSD.org
|/|/ / / /(  (_)  Bulte