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Message-ID: <20091014125344.7d0b2597@lxorguk.ukuu.org.uk>
Date: Wed, 14 Oct 2009 12:53:44 +0100
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: Mikael Pettersson <mikpe@...uu.se>
Cc: Krzysztof Halasa <khc@...waw.pl>,
Mikael Pettersson <mikpe@...uu.se>,
<linux-ide@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Robert Hancock <hancockrwd@...il.com>
Subject: Re: sata_via: SError: { UnrecovData Proto TrStaTrns }
> I guess you didn't see Alan Cox' recent comment about the vt6421:
> <http://marc.info/?l=linux-ide&m=125526699500519&w=2>.
>
> You should probably look for a mini-PCI card with a different chipset.
Docs have appeared - whether they will help tie it down completely I
don't know.
> > -RAID bus controller: VT6421 IDE RAID Controller (rev 50)
> > +IDE interface: VT6421 IDE RAID Controller (rev 50) (prog-if 8f [Master
> > SecP SecO PriP PriO])
That shouldn't matter of itself - its basically header differences
> >
> > - Control: Mem- FastB2B+ ...
> > + Control: Mem+ FastB2B- ...
> >
> > Mem - I guess x86-64 enables it for BIOS access. This is the only PCI
> > device in machine A (ARM).
> >
> > - Latency: 32
> > + Latency: 64
These two may be worth playing with, especially latency. Forcing the
latency on the problem board would be interesting given that it is a DMA
transfer that is failing.
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