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

Ralph Weber roweber at ieee.org
Thu Jan 3 18:35:29 PST 2008


* From the T10 Reflector (t10 at t10.org), posted by:
* Ralph Weber <roweber at ieee.org>
*
David,
I am having the dickens of a time comprehending why a device server
needs as many SAIs as an OSD has partitions. What am I missing?
All the best,
.Ralph
Black_David at emc.com wrote:
> 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/ 
>
*
* For T10 Reflector information, send a message with
* 'info t10' (no quotes) in the message body to majordomo at t10.org



More information about the T10 mailing list