Re: [PATCH] blacklist NCQ on Seagate Barracuda ST380817AS

[Mark Lord]

Tejun Heo wrote:
> Mark Lord wrote:
> > Jeff Garzik wrote:
> > > Paolo Ornati 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.
> > Yeah, that's pretty suspicious.  Prior to issuing a FLUSH_CACHE op,
> > one must first drain all outstanding NCQ commands (and not issue new ones).
> >
> > I'm sure the code must *try* to do that, but perhaps there's a bug in
> > there?
> > Or just another drive bug?
>
> If there was such a bug, the aborted commands list should contain both
> FPDMA commands and FLUSH commands.  I don't think command filtering
> itself is broken.  Possibly another quirky firmware but it's strange
> that this is the only Seagate drive showing this problem.

Yeah, that's the strange bit.

Surely someone at SuSE must have a drive like that,
which they could set up with XFS and reproduce the same results?

??
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