SAS revision 4 errata

Jim.Coomes at seagate.com Jim.Coomes at seagate.com
Fri Jun 20 12:02:29 PDT 2003


* From the T10 Reflector (t10 at t10.org), posted by:
* Jim.Coomes at seagate.com
*
Rob,

If there is a rev to SAS, here is another error:

Conflict text to figure:
doc page 122, Section 6.7.3.3.3 Transition SP2:OOB_NoCOMSATimeout to
SP3:OOB_AwaitCOMINIT_Sent
states "This transition shall occur after receiving a COMINIT Detected
message."

doc page 121 Figure 67 shows the SP2:OOB_NoCOMSASTimeout state tranitioning
to SP4 (rather than SP3) when COMINIT Detected message is received.

Problem:

Note: This is not the case illustrated in figure 66. In that case the
timeout occurred on COMINIT. Here the timeout is on COMSAS.

A transition to  SP3:OOB_AwaitCOMINIT_Sent will result in a hang as
Transmit COMINIT only occurs in SP0: COMINIT and a COMINIT Transmitted
confirmation is need to exit SP3:OOB_AwaitCOMINIT_Sent.

A transition to SP4:OOB_COMSAS is a problem for the attached phy. It may
have completed a Hot-plug timeout and transitioned to SP0: COMINIT. A
COMINIT Detected confirmation is required to exit the SP0.

Suggested Fix:
Change 6.7.3.3.3 to:
"Transition SP2:OOB_NoCOMSATimeout to SP0:OOB_COMINIT"

Change figure to reflect this change:
Delete arrow SP2 to SP4,
Add arrow SP2 to SP0 with COMINIT Detected.

Jim


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