COMRESET vs. COMWAKE after detecting a SATA device

Reif, Jim Jim.Reif at hp.com
Sat Oct 26 16:04:48 PDT 2002


* From the T10 Reflector (t10 at t10.org), posted by:
* "Reif, Jim" <Jim.Reif at hp.com>
*
I believe that this is a case where the figure is correct and the text is in error.

I think that the text should be reworded as follows:

Either response indicates to the SAS phy that a SATA phy is attached. As a result 
the SAS phy shall initiate the transmission of a SATA COMWAKE sequence.



	-----Original Message-----
	From:	Bashford, Patrick [SMTP:pbashfor at lsil.com]
	Sent:	Thursday, October 24, 2002 5:45 PM
	To:	't10 at t10.org'
	Subject:	COMRESET vs. COMWAKE after detecting a SATA device

	* From the T10 Reflector (t10 at t10.org), posted by:
	* "Bashford, Patrick" <pbashfor at lsil.com>
	*
	In Section "6.6.3 SAS to SATA phy reset sequence" (in rev 2b), there is the
	statement:

	Either response indicates to the SAS phy that a SATA phy is attached. As a
	result the SAS phy shall initiate a
	SATA reset sequence (i.e., transmit a COMRESET).

	However, Figure 46 shows transmission of a COMWAKE after the COMSAS Detect
	Timeout.
	Is the SAS phy required to restart the entire SATA reset sequence as implied
	by the comment, or
	is it allowed to continue with the COMWAKE as shown in Figure 46?
	*
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