linux-kernel - Re: Frequent SATA resets with sata

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Date:	Tue, 26 Jun 2007 12:06:37 -0400 (EDT)
From:	"Matthew \"Cheetah\" Gabeler-Lee" <cheetah-lkmlsata@...tcat.org>
To:	Robert Hancock <hancockr@...w.ca>
cc:	linux-kernel@...r.kernel.org, ide <linux-ide@...r.kernel.org>
Subject: Re: Frequent SATA resets with sata_nv (fwd)

On Sun, 24 Jun 2007, Robert Hancock wrote:

> Matthew "Cheetah" Gabeler-Lee wrote:
> > (Please cc me on replies)
> > 
> > I have three samsung hdds (/sys/block/sda/device/model says SAMSUNG SP2504C)
> > in a raid configuration.  My system frequently (2-3x/day) experiences
> > temporary lockups, which produce messages as below in my dmesg/syslog.  The
> > system recovers, but the hang is annoying to say the least.
> 
> Does this drive actually support NCQ? I can't tell from this part of the  log.

I selected that model in part because it at least claimed to support 
NCQ.  I'm not sure if it reflects NCQ or not, but I do have 
/sys/block/sd[abc]/device/queue_{depth,type} which show simple and 31 
respectively.  Samsung's page for the drive also says it supports NCQ: 
http://www.samsung.com/Products/HardDiskDrive/SpinPointPSeries/HardDiskDrive_SpinPointPSeries_SP2504C.htm

-- 
	-Cheetah
"Reality is that which, when you stop believing in it, doesn't go away".
                -- Philip K. Dick
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