linux-kernel - Re: sata_via: SError: { UnrecovData Proto TrStaTrns }

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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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