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Date: Sat, 01 Sep 2007 17:42:30 -0600 From: Robert Hancock <hancockr@...w.ca> To: Yan Seiner <yan@...ner.com> Cc: linux-kernel@...r.kernel.org Subject: Re: read-only /sys/block/sda/device/queue_depth 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@...pamshaw.ca Home Page: http://www.roberthancock.com/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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