linux-kernel - Re: Linux 2.6.29

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Message-ID: <49D12CD9.2030507@garzik.org>
Date:	Mon, 30 Mar 2009 16:34:33 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Michael Tokarev <mjt@....msk.ru>
CC:	Rik van Riel <riel@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ric Wheeler <rwheeler@...hat.com>,
	"Andreas T.Auer" <andreas.t.auer_lkml_73537@...us.ath.cx>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Theodore Tso <tytso@....edu>, Mark Lord <lkml@....ca>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rees <drees76@...il.com>, Jesper Krogh <jesper@...gh.cc>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.29

Michael Tokarev wrote:
> In the SATA world, I've seen no single case.  Seagate (7200.9..7200.11,
> Barracuda ES and ES2), WD (Caviar CE, Caviar Black, Caviar Green,
> RE2 GP), Hitachi DeskStar and UltraStar (old and new), some others --
> all the same, no DPO or FUA.

If your drive supports NCQ, it is highly likely it supports FUA.

By default, the libata driver _pretends_ your drive does not support FUA.

grep the kernel source for libata_fua and check out the module parameter 
'fua'

	Jeff



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