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From: Paolo Ornati <ornati@fastwebnet.it>
To: Robert Hancock <hancockr@shaw.ca>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
	Trevor Offner Caira <toc3@cornell.edu>
Subject: Re: PROBLEM: sata timeouts with intel 82801HB on amd64
Date: Thu, 8 Feb 2007 08:53:35 +0100	[thread overview]
Message-ID: <20070208085335.5e9e16db@localhost> (raw)
In-Reply-To: <45CAAD8D.7030007@shaw.ca>

On Wed, 07 Feb 2007 22:56:45 -0600
Robert Hancock <hancockr@shaw.ca> wrote:

> Paolo Ornati wrote:
> > If mounting XFS with "nobarrier" fixes the problem it seems that more
> > than one Seagate disk cannot handle the Cache Flush command while other
> > commands are in fly...
> 
> It's not allowed to overlap NCQ (FPDMA read/write) commands with any 
> other commands such as cache flushes. libata core guarantees that this 
> doesn't happen by deferring such requests until the FPDMA commands are 
> complete. (At least, it's supposed to..)

I didn't know that. Anyway just mounting XFS with "nobarrier" fixes
the ploblem for me... so libata is buggy or I don't know!

-- 
	Paolo Ornati
	Linux 2.6.20 on x86_64

  reply	other threads:[~2007-02-08  7:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <fa.C/AbnQN5ZU4HbNob5u7LvtyVH3U@ifi.uio.no>
     [not found] ` <fa.R4l8gBCDmrTiB/K/hEhS7a0vNoI@ifi.uio.no>
2007-02-08  4:56   ` Robert Hancock
2007-02-08  7:53     ` Paolo Ornati [this message]
2007-02-06  2:08 Trevor Offner Caira
2007-02-07  8:41 ` Paolo Ornati
2007-02-07 12:59   ` Trevor Offner Caira
2007-02-07 17:33     ` Paolo Ornati
2007-02-07 17:26 ` Otavio Salvador

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