P1394 Mail Archive: RE: P1394> May 1394 PWG Definitions

P1394 Mail Archive: RE: P1394> May 1394 PWG Definitions

RE: P1394> May 1394 PWG Definitions

Gregory A. LeClair (gleclair@agentz.com)
Fri, 22 May 1998 09:15:53 -0700

We equated a function to a unit directory. We called it a 'Unit' to equate
it to the 1212 unit definition.

If we need to include function from the point of view of 1212r - (based on
what we've been discussing)

A printer (Function) may be implemented with one or more protocols (Units)
which may allow access to one or more services (LUNs)

Therefore, the definition of function would seem to be
'The higher level capability of the Module / device which is accessed by
one of the Units. A singular function may be supported by more than one
Unit.'

Comments?

Greg

-----Original Message-----
From: ALAN_BERKEMA@HP-Roseville-om2.om.hp.com
[SMTP:ALAN_BERKEMA@HP-Roseville-om2.om.hp.com]
Sent: Friday, May 22, 1998 8:23 AM
To: atsnaka@bsd.canon.co.jp
Cc: ALAN_BERKEMA@HP-Roseville-om2.om.hp.com; p1394@pwg.org
Subject: RE: P1394> May 1394 PWG Definitions

I am still unclear about the definition of a function vs unit & service.

I do believe that since the PWG has found 1212 to be normative the 1212
definition and the PWG definition should serve the same purpose.

Alan

______________________________ Reply Separator
_________________________________
Subject: RE: P1394> May 1394 PWG Definitions
Author: Non-HP-atsnaka (atsnaka@bsd.canon.co.jp) at HP-Roseville,mimegw3
Date: 5/22/98 12:14 AM

First of all,
The defintion of "function" is for p1212r FDS purposes.
We may not even have to define "function" for the PWG profile, but it is
needed
for FDS.
I apologize if I should of done this in the 1212 reflector.

Alan said;
>
>The definition of a function seems to indicate that a function is a unit.
>

It CAN be considered that way in a ceratin implementation, but we CONNOT
say that is the ONLY way we have to see it.
(Especially in the case of FDS, where we have to start thinking
about other protocols.)
At one point in the discussison, Brian had mentioned that some people may
consider a service as a function, and visa-versa. I agree to this idea, and
I gu
ess
we are not allowed to give an answer (restriction) to the relationship
between a
function and a unit.
We agreed a unit corresponds to a driver (in the case of the PWG profile).
If so, the relationship of a driver to a function is implementation
specific.

The only restrictions I think I can make for "function" are :

1) A part of the unit architecture (not meaning a part of the unit, but
meaning
a part of this architecture i.e. part of a node, module, or whatever)
2) A collection(meaning 1 or more) of services
3) User identifiable

I cannot think of more resrtictions to add and still make the definition
consist
ant
within 1212

ats

>
>by Atsushi Nakamura
>----
>My shot at definition of "function":
>A function is part of the unit architecture and is an instance of a device
>model, e.g., mass storage, CD-ROM or printer. A function is usually a
>collection of services that are user identifiable.
>-----
>
>The definition of a function seems to indicate that a function is a unit.
>