P1394 Mail Archive: P1394> TARGET RESET & Unit/LU/Profile interactions

P1394 Mail Archive: P1394> TARGET RESET & Unit/LU/Profile interactions

P1394> TARGET RESET & Unit/LU/Profile interactions

Greg Shue (gregs@sdd.hp.com)
Mon, 14 Sep 1998 13:13:46 -0700 (PDT)

Hi all,

At the end of the last meeting I agreed to raise the following
issue on the reflector...

One of the areas still requiring clarification is the mapping
of transport and target transport clients into SBP-2 Units and
Logical Units. This is an area where the SCSI roots of SBP-2
have really impacted our efforts.

- Looking at the draft SCSI-3 ARCHITECTURE MODEL -2 (SAM-2) rev
0.3, I find that "Each SCSI-3 protocol standard shall specify
the response to a target reset event including the conditions
under which a target hard reset shall be executed.

- Looking at SBP-2, rev 4, we find TARGET RESET affects all
logged-in initiators (to any logical unit within the Unit).

Some questions which need to be answered are:

a) How is TARGET RESET used by drivers n commercial operating
systems? (Both non-embedded and embedded?)

b) Can we define how broadly (or narrowly) the TARGET RESET event
affects a device using our transport?

If so, how should it be defined?

If not, does this mean that we must use one Unit directory
for each possible instance of a service?

Ideas, anyone?

Greg Shue
Hewlett-Packard Company
All-in-One Division			        gregs@sdd.hp.com