Background operations and power loss expected

[Truong Nguyen - SISA]

Formatted message: <a href="http://www.t10.org/cgi-bin/ac.pl?t=r&f=r1110054_f.htm">HTML-formatted message</a>

Mark,
SAM5r07 also includes the following text in the same paragraph:
"Some commands initiate background operations that are processed after
the command is no longer in the taskset (i.e., status has been returned
for the command) (e.g., a SEND DIAGNOSTIC command when used to initiate
a background self-test (see SPC-4)..."
Truong
________________________________
From: Mark Evans [mailto:Mark.Evans at wdc.com] 
Sent: Wednesday, October 05, 2011 11:14 AM
To: Truong Nguyen - SISA; t10 at t10.org
Subject: RE: Background operations and power loss expected
Hi Truong,
A self-test being performed in the background mode is an operation that
is not a background operation.	This is defined in the device specific
background functions clause in SPC-4, which includes a sentence that
reads, "Device specific background functions do not include self-test
operations ... or background scan operations (see SBC-3)."
Please feel free to call or send an email to me with any comments or
questions that you have about this stuff. 
Regards, 
Mark Evans
Western Digital Corporation
5863 Rue Ferrari
San Jose, CA 95138
Email: mark.evans at wdc.com  
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Truong
Nguyen - SISA
Sent: Wednesday, October 05, 2011 10:15 AM
To: t10 at t10.org
Subject: Background operations and power loss expected
In 10-144r3 (SPC:4 Self-test and SEND DIAGNOSTIC command clean-up), text
was added to the Self-test operations Background mode model clause,
specifying changes regarding power loss expected handling. Specifically,
in sub-clause 5.8.4.3 Background mode (SPC-4r32), the following text was
added:
"A SCSI target device shall abort a self-test being performed in the
background mode as the result of a power loss expected event (see
SAM-4)."
However, in SAM-4r14 (and in SAM-5r07), the following text is present in
sub-clause 5.5 Command lifetime:
"Background operations shall not be aborted by I_T nexus loss or power
loss expected."
When a power loss expected event occurs, which is the correct behaviour
in terms of the background self-test? Should it be aborted or not be
aborted?
Thanks,
Truong Nguyen
Samsung Information Systems