From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Wakko Warner <wakko@animx.eu.org>
Cc: Richard Scobie <richard@sauce.co.nz>, linux-scsi@vger.kernel.org
Subject: Re: mptsas problem
Date: Sun, 13 Apr 2008 09:31:11 -0500 [thread overview]
Message-ID: <1208097071.4707.21.camel@localhost.localdomain> (raw)
In-Reply-To: <20080407010453.GA1952@animx.eu.org>
On Sun, 2008-04-06 at 21:04 -0400, Wakko Warner wrote:
> > From the message you posted, it looks as though there may be a problem
> > with sda.
>
> It's working fine with /sys/block/sd[abc]/device/queue_depth = 1 (on boot up,
> as stated before, it's 64)
>
> I performed the same copy again with queue_depth=1 after the array rebuilt.
> It worked fine then. No errors.
Actually, I'd say this is a signal for NCQ errors with the drive.
I'm afraid only LSI would be able to say for certain, because the mptsas
implements its NCQ handling in firmware. libata-core doesn't show any
special workarounds for your device (ST3750640AS) but that doesn't mean
there isn't a problem. If it's really an NCQ implementation issue, then
clamping the queue depth to 1 is about the only fix, I'm afraid.
James
next prev parent reply other threads:[~2008-04-13 14:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-06 23:40 mptsas problem Richard Scobie
2008-04-07 1:04 ` Wakko Warner
2008-04-13 13:00 ` Douglas Gilbert
2008-04-13 14:39 ` James Bottomley
2008-04-13 14:31 ` James Bottomley [this message]
2008-04-13 16:48 ` Wakko Warner
2008-04-13 16:58 ` James Bottomley
2008-04-13 17:06 ` Wakko Warner
2008-04-13 17:37 ` James Bottomley
2008-04-13 20:49 ` Wakko Warner
2008-04-14 18:16 ` Moore, Eric
2008-04-14 21:34 ` Wakko Warner
2008-04-15 17:26 ` Moore, Eric
2008-04-15 22:49 ` Wakko Warner
2008-04-13 22:22 ` Douglas Gilbert
2008-04-13 23:51 ` James Bottomley
-- strict thread matches above, loose matches on Subject: below --
2008-04-06 19:56 Wakko Warner
[not found] ` <0631C836DBF79F42B5A60C8C8D4E8229F64FC1@NAMAIL2.ad.lsil.com>
2008-04-07 1:07 ` Wakko Warner
2008-04-07 11:36 ` Bernd Schubert
2008-04-07 15:16 ` Moore, Eric
2008-04-07 16:54 ` Wakko Warner
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