From: Stefan Seyfried <seife@suse.de>
To: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jgarzik@pobox.com>,
linux-ide@vger.kernel.org, Danny Kukawka <dkukawka@suse.de>
Subject: Re: [PATCH] libata: use FLUSH_EXT only when driver is larger than LBA28 limit
Date: Fri, 10 Nov 2006 20:18:34 +0100 [thread overview]
Message-ID: <20061110191834.GA8359@suse.de> (raw)
In-Reply-To: <20061110183304.GA22793@htj.dyndns.org>
On Sat, Nov 11, 2006 at 03:33:04AM +0900, Tejun Heo wrote:
> Interestingly, at least one of such drives (ST960812A) has problems
> dealing with FLUSH_EXT. It eventually completes the command but takes
> around 7 seconds to finish in many cases thus drastically slowing down
> IO transactions. This seems to be a firmware bug which sneaked into
> production probably because no other ATA driver including linux IDE
> issues FLUSH_EXT to drives which report support for LBA48 & FLUSH_EXT
> but is smaller than 1<<28 blocks.
Note that i'm quite sure that i have seen this on more than this single
drive. It might be that those were all seagates, though.
--
Stefan Seyfried
QA / R&D Team Mobile Devices | "Any ideas, John?"
SUSE LINUX Products GmbH, Nürnberg | "Well, surrounding them's out."
next prev parent reply other threads:[~2006-11-10 19:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-10 18:33 [PATCH] libata: use FLUSH_EXT only when driver is larger than LBA28 limit Tejun Heo
2006-11-10 18:44 ` Tejun Heo
2006-11-10 19:18 ` Stefan Seyfried [this message]
2006-11-11 11:10 ` [PATCH UPDATED] " Tejun Heo
2006-11-14 18:46 ` Jeff Garzik
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