From owner-freebsd-fs@FreeBSD.ORG  Wed Apr 18 15:39:22 2007
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Date: Wed, 18 Apr 2007 10:39:20 -0500
From: "Rick C. Petty" <rick-freebsd@kiwi-computer.com>
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Subject: Re: [ZFS] Problems with SATA disks (SET TRANSFERT MODE ...)
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On Wed, Apr 18, 2007 at 04:14:54PM +0200, Dag-Erling Sm?rgrav wrote:
> "Rick C. Petty" <rick-freebsd@kiwi-computer.com> writes:
> > The ideal solution is to figure out why the Promise doesn't properly
> > reinitialize after a detach/attach..  if that's even possible.
> 
> It shouldn't detach / attach in the first place.  The primary issue
> (in my view) is the DMA timeout.

I completely agree that the DMA timeouts should be less sensitive to
"disappearing drives" when in fact the drives are just fine.  However, it
can't hurt to fix the attach/detach problem also, because it's perfectly
legitimate to hot-swap SATA drives.

-- Rick C. Petty