Negotiation Idle transmission

Rakesh KN Rakesh.KN at jdsu.com
Tue Nov 26 08:48:43 PST 2013


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Thanks George.
Best Regards
Rakesh K N
Storage Network Tools
Email:	  rakesh.kn at jdsu.com
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From: Penokie, George [mailto:George.Penokie at lsi.com]
Sent: Wednesday, November 27, 2013 12:43 AM
To: Rakesh KN
Cc: Newman, Harvey; Voorhees, Bill; Petty, William
Subject: RE: Negotiation Idle transmission
Rakesh,
Thanks for pointing this error out. The text in SPL-3 was not modified to
match a change that was made to SAS-3. I have placed a letter ballot comment
against SPL-3 that will remove the duplicated text from SPL-3 and replace it
with a reference to SAS-3.
Bye for now,
George Penokie
LSI Corporation
3033 41 St NW
Rochester , MN 55901
507-328-9017
george.penokie at lsi.com
From: Rakesh KN [mailto:Rakesh.KN at jdsu.com]
Sent: Thursday, November 21, 2013 4:32 PM
To: Penokie, George
Subject: Negotiation Idle transmission
Hi George,
  For Negotiation Idle transmission during the optical mode  there is some
inconsistency between the SAS3 document (Revision 05h, 18 October 2013 ) and 
SPL document (Revision 06, 19 September 2013). SAS3 document specifies the
transmission is at 3Gbits/s while SPL3 states that it can be at vendor
specific rate starting from 1.5Gbit/s. According to SAS3 we can always expect
to detect the OOB idle at 3G rate in the receiver but as per SPL3 we need to
consider that device may transmit even at 6G. Please correct me if my
understanding is wrong.
>From SAS3 document (Revision 05h, 18 October 2013 )
If D.C. mode is enabled, then an OOB idle consists of the transmission of
D.C. idle.
If optical mode is enabled, then an OOB idle consists of repetitions of the
following steps:
1) transmission of six OOB_IDLE primitives with either starting disparity at
3 Gbits/s; and
2) transmission of up to 512 data dwords (e.g., two data dwords for COMWAKE
idle time, 18 data
dwords for COMINIT/COMRESET idle time, and 66 data dwords for COMSAS idle
time) set to
0000_0000h that are 8b10b encoded, scrambled, and transmitted at 3 Gbits/s.
>From SPL document (Revision 06, 19 September 2013)
5.12.4.2 Negotiation idle
SAS speed negotiation states use negotiation idle at the beginning of each
SNW.
If D.C. mode is enabled, then a negotiation idle consists of the transmission
of D.C. idle.
If optical mode is enabled, then a negotiation idle consists of repetitions
of the following steps:
1) transmission of six OOB_IDLEs with either starting disparity at a vendor
specific bit rate of at least 1.5
Gbit/s; and
2) transmission of up to 512 data dwords set to 00000000h that are
transmitted scrambled and 8b10b
encoded at a vendor specific bit rate of at least 1.5 Gbit/s.
Best Regards
Rakesh
JDSU
Storage Network Tools
Email:	  rakesh.kn at jdsu.com
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