Date: Wed, 16 Jun 2010 16:31:14 -0400 From: Andrew Boyer <aboyer@averesystems.com> To: Matthew Jacob <mj@feral.com> Cc: freebsd-scsi@freebsd.org Subject: Re: Overlapped Commands error Message-ID: <A29A9125-871C-42F0-90D6-85EF96602419@averesystems.com> In-Reply-To: <4C1930BF.3090408@feral.com> References: <51DD9715-89B2-4058-A4FE-7097603013CC@averesystems.com> <4C1930BF.3090408@feral.com>
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On Jun 16, 2010, at 4:14 PM, Matthew Jacob wrote:
>> Can anyone point me to where in the stack the command identifier is assigned? I see where MPT assigns tags in target mode, but it's the initiator in this case. Any advice?
>
> The mpt f/w assigns tags. Don't really know what happened here.
>
>> Also, is CAM doing the right thing by retrying? scsi_error_action() in cam/scsi/scsi_all.c always sets the retry bit on aborted commands, even though the spec quoted above makes it sound like this should be a fatal error ("This is considered a catastrophic failure on the part of the SCSI initiator device"). Should scsi_error_action() be looking at the Additional Sense Code?
>
> Not really, IMO. It's up to each periph driver to decide whether commands are statefull or can be retried with impunity.
>
OK. Thank you for looking into it.
-Andrew
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Andrew Boyer aboyer@averesystems.com
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