linux-kernel - Re: WD SATA disk works on nv but not on ahci

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Message-ID: <20080402191151.GT11237@mx01>
Date:	Wed, 2 Apr 2008 21:11:51 +0200
From:	Michael Stapelberg <michael+lkml@...pelberg.de>
To:	Matt Keenan <tank.en.mate@...il.com>
Cc:	Jeff Garzik <jeff@...zik.org>, linux-kernel@...r.kernel.org
Subject: Re: WD SATA disk works on nv but not on ahci

Hi Matt,

* [02.04.08 20:50]:
> What's your NCQ queue length for these drives?
I thought it's mentioned in the dmesg-output, but I just plugged the drive in
and re-checked:

> # for dev in /sys/block/sd*/device/queue_depth ; do echo -n "$dev: " ; \
> cat $dev ; done
/sys/block/sda/device/queue_depth: 1                                            
/sys/block/sdb/device/queue_depth: 1
This means NCQ is disabled for this device AFAIK.

Best regards,
Michael
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