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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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).
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 &
	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. 
	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

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