QAS question

Day, Brian bday at lsil.com
Tue Feb 27 12:32:19 PST 2001


* From the T10 Reflector (t10 at t10.org), posted by:
* "Day, Brian" <bday at lsil.com>
*
I would also expect the target go to MSG_OUT like any ATN condition.

The initiator would send a MESSAGE PARITY ERROR message.

Brian Day
LSI Logic Corp.


> -----Original Message-----
> From:	Bruce Leshay [SMTP:Bruce.Leshay at quantum.com]
> Sent:	Tuesday, February 27, 2001 12:31 PM
> To:	t10 at t10.org
> Subject:	RE: QAS question
> 
> * From the T10 Reflector (t10 at t10.org), posted by:
> * Bruce Leshay <Bruce.Leshay at quantum.com>
> *
> My understanding is that the initiator is required to assert ATN on the
> QAS
> message if he detects a parity error, before deasserting ACK.  All QAS
> devices must sample ATN on the ACK deassertion of a QAS message, and
> ignore
> the message if ATN is asserted.
> 
> I assume that the target that sent the QAS message would go to MSG_OUT
> phase
> just like with any ATN assertion?  And the initiator would send ???
> 
> 						Bruce Leshay	
> 						Quantum Corporation
> 
> 
> 
> -----Original Message-----
> From: George_Penokie at tivoli.com [mailto:George_Penokie at tivoli.com]
> Sent: Tuesday, February 27, 2001 2:18 PM
> To: t10 at t10.org
> Subject: QAS question
> 
> 
> * From the T10 Reflector (t10 at t10.org), posted by:
> * George_Penokie at tivoli.com
> *
> OK all you QAS experts, here is a question I have received that I don't
> have a good answer for.
> 
> What happens if the initiator on the I_T nexus detects a parity error on a
> QAS message? And, to make things even more interesting, the device that
> wants the bus does not see a parity error on the same QAS message?
> 
> Bye for now,
> George Penokie
> 
> Dept 2C6  114-2 N212
> E-Mail:    gpenokie at tivoli.com
> Internal:  553-5208
> External: 507-253-5208   FAX: 507-253-2880
> 
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