SAS2 CJTPAT with SSP header

Tamer Kafafi Tamer_Kafafi at pmc-sierra.com
Wed Jul 25 21:32:09 PDT 2007


Formatted message: <A HREF="r0707256_f.htm">HTML-formatted message</A>

In fact there are other errors:
- The scramble XORing is performed incorrectly on the first dword. It should
be C3D2768Dh not D2D2768Dh
- The scrambler value for the crc slot should be 3D2D7984h not 9AFCB3DDh
The corrected table is below:
Data
dword
number
SSP frame contents
SMP frame contents
Desired
pattern
(ON THE WIRE)
Scrambler
output
Scrambled
pattern
Not
applicable
SOF
SOF
Not applicable
SOF
0
FRAME TYPE field set
to 01h (i.e., DATA
frame) and 23
subsequent bytes
each set to 00h
SMP FRAME TYPE field
set to 01h (i.e.,
reserved) and 23
subsequent
frame-type dependent
bytes each set to 00h
C3D2768Dh
C2D2768Dh
01000000h
1
1F26B368h
1F26B368h
00000000h
2
A508436Ch
A508436Ch
00000000h
3
3452D354h
3452D354h
00000000h
4
8A559502h
8A559502h
00000000h
5
BB1ABE1Bh
BB1ABE1Bh
00000000h
6
INFORMATION UNIT field
Frame-type
dependent bytes
See the INFORMATION UNIT field in table A.4
117
118
CRC field
79C211AAh
 3D2D7984h
44EF682Eh
Not
applicable
EOF
EOF
Not applicable
EOF
Thanks
Tamer Kafafi 
Senior Product Design Engineer, ESD 
PMC-Sierra 
  _____  
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Tamer Kafafi
Sent: Tuesday, July 24, 2007 4:31 PM
To: 't10 at t10.org'
Subject: SAS2 CJTPAT with SSP header
Robert, 
Regarding the proposal 07-297r1 , Table A.6 - CJTPAT with fixed content -  is
incorrect. 
The columns "desired pattern" and "scrambled pattern" should be interchanged
for rows 1 to 6. The "desired pattern" column represents what should be on
the wire, while the "scrambled pattern" column represents what the
application/transport layer sees. Obviously the newly added SSP header should
be visible at the application/transport layer not on the wire.
Also, as a result, the CRC values in row 118 will be completely different. 
Thanks 
Tamer Kafafi 
Senior Product Design Engineer, ESD 
PMC-Sierra 



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