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Date:	Sun, 30 Sep 2007 11:43:38 -0400
From:	Jeff Garzik <>
To:	Paolo Ornati <>
CC:	Alan Cox <>, Tejun Heo <>,
	Linux Kernel Mailing List <>,
Subject: Re: [PATCH] blacklist NCQ on Seagate Barracuda ST380817AS

Paolo Ornati wrote:
> On Sun, 30 Sep 2007 11:05:17 -0400
> Jeff Garzik <> wrote:
>>> I have this problem only with XFS, and even with XFS it goes away
>>> mounting with "nobarrier"...  
>> This last is an interesting datapoint.
>> I wonder if libata has a generic problem with NCQ + FLUSH CACHE.
>> What happens if you enable the 'fua' module parameter?  (libata.fua on 
>> kernel command line, if built in)
> it isn't supported here:
> sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA

Did you actually try my suggestion?

That message is normal, because libata defaults to FUA==off.


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