linux-kernel - Re: sata_mv 0000:03:06.0: PCI ERROR; PCI IRQ cause=0x30000040

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Date:	Tue, 06 Oct 2009 23:13:51 -0400
From:	Mark Lord <liml@....ca>
To:	Bernie Innocenti <bernie@...ewiz.org>
Cc:	Harri Olin <harri.olin@...il.com>, linux-ide@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>, sysadmin <sysadmin@....org>
Subject: Re: sata_mv 0000:03:06.0: PCI ERROR; PCI IRQ cause=0x30000040

Bernie Innocenti wrote:
> El Tue, 06-10-2009 a las 20:06 -0400, Bernie Innocenti escribió:
>>> The early revs of these chips did have a number of errata specific to PCI-X.
>> I checked the revision (09) against the sata_mv source and I couldn't
>> spot anything relevant to us.
> 
> NEWSFLASH: today we replaced the 4x500GB Seagate drives with 4x1.5TB
> drives and reconstruction of the array has been running for 2h without a
> glitch.
> 
> One interesting difference is that the 500GB drives were being
> configured in 1.5Gbps SATA mode.  Another notable difference is the
> sequential read speed: ~70MB/s vs ~130MB/s with the 1.5TB model.
> 
> Could the PCI bus errors be a red herring?
..

Dunno.  Rev.9 == "C0" in Marvell terminology,
and that's the latest/final rev for the 6081 chip,
with most of the PCI-X bugs fixed or worked around.
So not much to go on there.

The Bus error report was real, though.
But with 3.0gb/sec sata connections, the chip will be
using some different internal clocks and timings,
which could be enough to avoid triggering the PCI errors.

I guess.  Let's hope so, anyway.

Cheers


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