Expander device type discrepancy
George.Penokie at lsi.com
Mon Jul 22 11:29:11 PDT 2013
Formatted message: <a href="http://www.t10.org/cgi-bin/ac.pl?t=r&f=r130722b_f.htm">HTML-formatted message</a>
The DEVICE TYPE field code 011b should have been marked obsolete when
proposal 09-374r3 marked the Attached Device Type 011b field as obsolete. I
will write a proposal to do that.
Bye for now,
3033 41 St NW
Rochester , MN 55901
george.penokie at lsi.com
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Apoorva Vats
Sent: Monday, July 22, 2013 5:40 AM
To: t10 at t10.org
Subject: Expander device type discrepancy
As specified in "SAS Protocol Layer - 3 (SPL-3) " version specification
(T10/BSR INCITS 492)( Revision 02 / 16 January 2013)
In case of "IDENTIFY ADDRESS" frame
Page no. 328
The DEVICE TYPE field indicates the type of device containing the phy, and is
defined in table 119.
Table 119 - DEVICE TYPE field
Expander device compliant with SAS-1.1
Here "DEVICE TYPE" field in IDENTIFY ADDRESS FRAME specifies 2 types of
But in case of "SMP DISCOVER" response:
Page no. 652
The ATTACHED DEVICE TYPE field indicates the device type attached to this phy
and is defined in table 269.
Table 269 - ATTACHED DEVICE TYPE field
No device attached
SAS device or SATA device
Here "ATTACHED DEVICE TYPE" only specifies single type of Expander.
In "IDENTIFY ADDRESS" there are 2 types of Expanders specified but in case of
"SMP DISCOVER "response frame only single type of Expander is specified.
Please help me understand about this discrepancy.
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