From: Robert Hancock <hancockr@shaw.ca>
To: Yan Seiner <yan@seiner.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: read-only /sys/block/sda/device/queue_depth
Date: Sat, 01 Sep 2007 17:42:30 -0600 [thread overview]
Message-ID: <46D9F8E6.8010101@shaw.ca> (raw)
In-Reply-To: <fa.opJB7DxTb+exFimOMpdmVACjitE@ifi.uio.no>
Yan Seiner wrote:
> I'm running into the same issue reported here:
>
> <http://readlist.com/lists/vger.kernel.org/linux-kernel/72/361184.html>
>
> I am using the ata_piix module. If I read the docs correctly, I should
> be able to use ahci as well; I need to rebuild the kernel though (debian
> insists on putting ata_piix into the initrd....)
>
> dionysus:~# ls -l /sys/block/sd[abcde]/device/queue_depth
> -r--r--r-- 1 root root 4096 2007-09-01 06:00
> /sys/block/sda/device/queue_depth
> -r--r--r-- 1 root root 4096 2007-09-01 06:00
> /sys/block/sdb/device/queue_depth
> -r--r--r-- 1 root root 4096 2007-09-01 06:00
> /sys/block/sdc/device/queue_depth
> -r--r--r-- 1 root root 4096 2007-09-01 06:00
> /sys/block/sdd/device/queue_depth
> -r--r--r-- 1 root root 4096 2007-09-01 06:00
> /sys/block/sde/device/queue_depth
>
> If I change the perms to rw, I get an Input/Output error. AFAICT, the
> drives support queueing, but it's disabled.
ata_piix does not support NCQ. You have to use AHCI mode for that.
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/
next parent reply other threads:[~2007-09-01 23:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.opJB7DxTb+exFimOMpdmVACjitE@ifi.uio.no>
2007-09-01 23:42 ` Robert Hancock [this message]
2007-09-01 13:16 read-only /sys/block/sda/device/queue_depth Yan Seiner
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