From: Tejun Heo <htejun@gmail.com>
To: Robert Hancock <hancockr@shaw.ca>
Cc: "Lanstein, Alex C" <aclan@conncoll.edu>, linux-ide@vger.kernel.org
Subject: Re: NCQ change on 2007-12-07
Date: Thu, 13 Mar 2008 12:28:10 +0900 [thread overview]
Message-ID: <47D89F4A.7090008@gmail.com> (raw)
In-Reply-To: <47D89A58.6010301@shaw.ca>
Hello,
Robert Hancock wrote:
> I don't think the driver is to blame for this one. CPB resp_flags of 2
> indicates the controller says that tag is "released", i.e. drive has
> been given the command but not completed. If it's timing out in that
> state, either the NCQ implementation is bad enough that it allows
> certain queued commands to starve for over 30 seconds, or the drive is
> just forgetting about them entirely.
>
> Unfortunately, if the firmware revision does indeed appear the same on
> both sets of drives, the only automated way we could likely address the
> problem would be to blacklist NCQ on all of those drives of that
> model/revision..
Hmm... it's weird that this problem hasn't been reported on other
controllers. Lanstein, can you be persuaded into trying out another NCQ
capable controller?
--
tejun
prev parent reply other threads:[~2008-03-13 3:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <D8AE5DC69BFCA64989BE8E46BCF0047303B24F2E@MAPLE.conncoll.edu>
[not found] ` <47D76B7D.8010808@gmail.com>
2008-03-12 15:08 ` NCQ change on 2007-12-07 Lanstein, Alex C
2008-03-13 3:07 ` Robert Hancock
2008-03-13 3:28 ` Tejun Heo [this message]
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