DS_SAI length conflict between 07-437r4 and 07-169 & SPC-4

Black_David at emc.com Black_David at emc.com
Wed Jan 2 11:18:55 PST 2008


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Kevin,
We need to make a decision on this one because there is no obvious
right answer.  IETF uses separate SPIs (what T10 calls SAIs) for
IKEv2 and ESP - 8 bytes SPIs are used for IKEv2, but ESP uses 4 byte
SPIs.  SCSI is using the same SPI for both purposes, and hence needs
to pick one length - I agree with your suggestion that 8 bytes (as
used in IKEv2-SCSI) is preferable.  From an implementation standpoint
this would reduce the impact on reuse of the more complex IKEv2
implementations (more complex is by comparison to ESP).
Thanks,
--David
----------------------------------------------------
David L. Black, Distinguished Engineer
EMC Corporation, 176 South St., Hopkinton, MA  01748
+1 (508) 293-7953	      FAX: +1 (508) 293-7786
black_david at emc.com	   Mobile: +1 (978) 394-7754
----------------------------------------------------
________________________________
	From: Kevin D Butt [mailto:kdbutt at us.ibm.com] 
	Sent: Friday, December 21, 2007 11:24 AM
	To: roweber at ieee.org; Black, David; matt.ball at ieee.org
	Cc: t10 at t10.org
	Subject: DS_SAI length conflict between 07-437r4 and 07-169 &
SPC-4
	Ralph, David, and Matt, 
	All the DS_SAI values in the ESP-SCSI (07-169r5) (e.g., Table x3
- ESP-SCSI data-out buffer parameter list descriptor without
initialization vector) are shown as 4-byte values as they are in SPC-4
Table 44 - Minimum SA parameters.  However 07-437r4 shows them as 8-byte
values.  I think 07-437r4 is correct and SPC-4 and 07-169 need to be
modified to match. 
	Thanks, 
	Kevin D. Butt
	SCSI & Fibre Channel Architect, Tape Firmware
	MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
	Tel: 520-799-2869 / 520-799-5280
	Fax: 520-799-2723 (T/L:321)
	Email address: kdbutt at us.ibm.com
	http://www-03.ibm.com/servers/storage/ 



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