SAS Target port transfer tag and first burst DATA frames

Bill Galloway BillG at
Wed Jan 22 17:09:59 PST 2003

* From the T10 Reflector (t10 at, posted by:
* "Bill Galloway" <BillG at>
I think we should require the initiator to set it to FFFFh for first burst
write data.

Bill Galloway
BREA Technologies, Inc.
BillG at
P: (281) 530-3063
F: (281) 988-0398 

-----Original Message-----
From: owner-t10 at [mailto:owner-t10 at] On Behalf Of Elliott,
Robert (Server Storage)
Sent: Wednesday, January 22, 2003 6:03 PM
To: t10 at
Subject: SAS Target port transfer tag and first burst DATA frames

The SAS protocol WG decided to relax the rules on the TARGET PORT TRANSFER
TAG so the target and initiator can choose any value they want outside of
XFER_RDY frames and write DATA frames in response to XFER_RDY frames.

Should we require the initiator set the target port transfer tag to any
particular value (e.g. FFFFh) for write DATA frames that contain first burst
data?  If we don't, this feature will be unusable for targets using first
bursts (since the initiator could choose a value that matches one of the
target's XFER_RDY-indicated tags).

Rob Elliott, elliott at 
Hewlett-Packard Industry Standard Server Storage Advanced Technology <>  

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