From: Black_David@emc.com Subject: RE: DS_SAI length conflict between 07-437r4 and 07-169 & SPC-4 Date: Wed, 2 Jan 2008 14:18:55 -0500 To: <kdbutt@us.ibm.com>, <roweber@IEEE.org>, <matt.ball@IEEE.org> Cc: <t10@t10.org> X-Message-Number: 8353 Formatted message: HTML-formatted message 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@emc.com Mobile: +1 (978) 394-7754 ---------------------------------------------------- ________________________________ From: Kevin D Butt [mailto:kdbutt@us.ibm.com] Sent: Friday, December 21, 2007 11:24 AM To: roweber@ieee.org; Black, David; matt.ball@ieee.org Cc: t10@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@us.ibm.com http://www-03.ibm.com/servers/storage/