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Date: Thu, 19 Apr 2007 12:33:16 -0500
From: "Rick C. Petty" <rick-freebsd@kiwi-computer.com>
To: Dag-Erling Sm?rgrav <des@des.no>
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Cc: piso@freebsd.org, fs@freebsd.org
Subject: Re: ZFS + replacing failing hard-drive.
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On Thu, Apr 19, 2007 at 10:25:31AM +0200, Dag-Erling Sm?rgrav wrote:
> 
> Yes.  I have four brand new disks which are giving me DMA timeouts all
> the time.
> 
> There seem to be bugs in (or in relation with) the ata driver which
> have surfaced only recently.
> 
> Now that I think about it - could this be related to interrupt
> filtering?  Piso?  If the ata driver is losing interrupts, it's no
> wonder the transfers are timing out.

What do you mean by recently?  I've seen this problem which started around
5.4-RELEASE (perhaps earlier) and on, including 6.0-R thru 6.2-stable as of
a few weeks ago.  Would the interrupt filtering be present on these
systems?

-- Rick C. Petty