Prioritized Unit Attention Reporting

peterson_gary at emc.com peterson_gary at emc.com
Tue Feb 15 06:13:00 PST 2005


* From the T10 Reflector (t10 at t10.org), posted by:
* peterson_gary at emc.com
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Part of our thinking is that we would maintain one queued Unit Attention
condition for each priority level.

We don't have the memory to maintain an arbitrarily deep Unit Attention
queue for each nexus, so this is an attempt to preserve as much
information as possible without taking memory from other needs.

 

So, if a second Unit Attention condition wished to be established at the
same priority level than one that already exists (is queued), the new
condition would be dropped.

 

Looking back at my document, it appears I neglected to mention this part
of the design.

 

 

 

  _____  

From: Robert Snively [mailto:rsnively at Brocade.COM] 
Sent: Friday, February 11, 2005 2:35 PM
To: peterson_gary at emc.com
Cc: Robert Snively; Gerry.Houlder at seagate.com
Subject: RE: Prioritized Unit Attention Reporting

 

Gary,

 

How does prioritizing the unit attentions decrease the amount of
information you

are required to keep?  You still have to maintain an arbitrarily deep
queue of unit

attentions against initiators that do not access the devices very often,
don't you?

Are you planning to delete some unit attentions against such devices?

 

Bob

-----Original Message-----
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org]On Behalf Of
peterson_gary at emc.com
Sent: Thursday, February 10, 2005 1:50 PM
To: t10 at t10.org
Cc: peterson_gary at emc.com
Subject: Prioritized Unit Attention Reporting

To:       T10

 

From:   Gary S. Peterson

            EMC Corporation, CLARiiON Division

 

Re:       Prioritized Unit Attention Reporting

 

Date:    February 10, 2005

 

            In the ongoing development of our storage systems, we have
come to the conclusion that reporting multiple Unit Attentions on an
I_T_L nexus basis is desirable to report the various conditions to the
initiators communicating with our array may encounter. However, our
design does not easily lend itself to open-ended queuing of Unit
Attention conditions due to the large number of I_T_L nexus that we
support in our storage arrays. 

 

            We are instead considering a "prioritized" Unit Attention
structure. Each potential Unit Attention report will be assigned a
priority level for reporting, with each level holding a single Unit
Attention condition. The highest priority Unit Attention condition will
be reported on the next command from the affected initiator. The second
highest priority Unit Attention condition will be reported on the second
command received from the affected initiator, and so on.

 

            The priority structure we're currently looking at that is
along the following lines:

            

            Priority 1 (Highest): Logical Unit Existence (as seen by the
initiator) Changed

                        06/3F/0E          REPORT LUNS DATA Has Changed

                        

            Priority 2: Logical Unit Capacity Changed

                        06/3F/0A         VOLUME SET CREATED OR MODIFIED

 

            Priority 3: Logical Unit Access Changed

                        06/2A/04         RESERVATIONS RELEASED

                        06/2A/05         RESERVATIONS PREEEMPTED

 

            Priority 4: Logical Unit Task Set Changed

                        06/2F/00          COMMANDS CLEARED BY ANOTHER
INITIATOR

            

            Priority 5 (Lowest): Logical Unit Parameters Changed

06/29/00          POWER ON, RESET OR BUS DEVICE RESET OCCURRED

                        06/2A/01         MODE PARAMETERS CHANGED

 

 

A reading of the ANSI documentation regarding multiple Unit Attention
conditions only states that "Logical Unit may queue Unit Attention
conditions." (SAM-2, section 5.9.5).

 

 

We therefore have two questions:

 

1.      Is our proposed reporting scheme legal from an ANSI standards
viewpoint?

2.      Is this (or a similar) scheme something ANSI wishes to add to
the standards?

 

 


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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Part of our thinking is that we =
would
maintain one queued Unit Attention condition for each priority =
level.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>We don't have the memory to =
maintain
an arbitrarily deep Unit Attention queue for each nexus, so this is an =
attempt
to preserve as much information as possible without taking memory from =
other
needs.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>=


<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>So, if a second Unit Attention =
condition
wished to be established at the same priority level than one that =
already
exists (is queued), the new condition would be =
dropped.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>=


<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Looking back at my document, it =
appears I neglected
to mention this part of the design.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>=


<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>=


<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>=


<div>

<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font =
size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>

<hr size=3D2 width=3D"100%" align=3Dcenter tabindex=3D-1>

</span></font></div>

<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'> =
Robert Snively
[mailto:rsnively at Brocade.COM] <br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Friday, February =
11, 2005
2:35 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> =
peterson_gary at emc.com<br>
<b><span style=3D'font-weight:bold'>Cc:</span></b> Robert Snively;
Gerry.Houlder at seagate.com<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> RE: Prioritized =
Unit
Attention Reporting</span></font><o:p></o:p></p>

</div>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<div>

<p class=3DMsoNormal><st1:City w:st=3D"on"><st1:place w:st=3D"on"><font =
size=3D2
  color=3Dblue face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;
  color:blue'>Gary</span></font></st1:place></st1:City><font size=3D2 =
color=3Dblue
face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;color:blue'>,</span></font><=
o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;<o:p></o:p></span></font></p>

</div>

<div>

<p class=3DMsoNormal><font size=3D2 color=3Dblue face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>How does prioritizing the unit =
attentions
decrease the amount of information you</span></font><o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><font size=3D2 color=3Dblue face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>are required to keep?&nbsp; You =
still have
to maintain an arbitrarily deep queue of =
unit</span></font><o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><font size=3D2 color=3Dblue face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>attentions against initiators that =
do not
access the devices very often, don't you?</span></font><o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><font size=3D2 color=3Dblue face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>Are you planning to delete some =
unit
attentions against such devices?</span></font><o:p></o:p></p>

</div>

<div>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;<o:p></o:p></span></font></p>

</div>

<div>

<p class=3DMsoNormal><font size=3D2 color=3Dblue face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>Bob</span></font><o:p></o:p></p>

</div>

<blockquote style=3D'border:none;border-left:solid blue =
1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt=
'>

<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><font size=3D2 =
face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b> owner-t10 at t10.org
[mailto:owner-t10 at t10.org]<b><span style=3D'font-weight:bold'>On Behalf =
Of </span></b>peterson_gary at emc.com<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, February =
10, 2005
1:50 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> t10 at t10.org<br>
<b><span style=3D'font-weight:bold'>Cc:</span></b> =
peterson_gary at emc.com<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Prioritized =
Unit
Attention Reporting</span></font><o:p></o:p></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>To:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
T10<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>From:&nbsp;&nbsp; Gary S. Peterson<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; EMC
Corporation, CLARiiON Division<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>Re:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Prioritized Unit =
Attention
Reporting<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>Date:&nbsp;&nbsp;&nbsp; February 10, =
2005<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; In
the ongoing development of our storage systems, we have come to the =
conclusion
that reporting multiple Unit Attentions on an I_T_L nexus basis is =
desirable to
report the various conditions to the initiators communicating with our =
array
may encounter. However, our design does not easily lend itself to =
open-ended
queuing of Unit Attention conditions due to the large number of I_T_L =
nexus
that we support in our storage arrays. <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; We
are instead considering a "prioritized" Unit Attention =
structure.
Each potential Unit Attention report will be assigned a priority level =
for
reporting, with each level holding a single Unit Attention condition. =
The
highest priority Unit Attention condition will be reported on the next =
command
|from the affected initiator. The second highest priority Unit Attention
condition will be reported on the second command received from the =
affected
initiator, and so on.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; The
priority structure we're currently looking at that is along the =
following
lines:<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; <u>Priority
1 (Highest): Logical Unit Existence (as seen by the initiator) =
Changed<o:p></o:p></u></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
06/3F/0E&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style=3D'text-transform:uppercase'>REPORT LUNS DATA Has =
Changed</span><o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; <u>Priority
2: Logical Unit Capacity Changed<o:p></o:p></u></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
06/3F/0A&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; VOLUME SET =
CREATED OR
MODIFIED<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; <u>Priority
3: Logical Unit Access Changed<o:p></o:p></u></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
06/2A/04&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RESERVATIONS =
RELEASED<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
06/2A/05&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RESERVATIONS
PREEEMPTED<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; <u>Priority
4: Logical Unit Task Set Changed<o:p></o:p></u></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
06/2F/00&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; COMMANDS =
CLEARED
BY ANOTHER INITIATOR<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; <u>Priority
5 (Lowest): Logical Unit Parameters =
Changed<o:p></o:p></u></span></font></p>

<p class=3DMsoNormal =
style=3D'margin-left:2.0in;text-indent:-1.0in'><font size=3D3
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt'>06/29/00&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;
POWER ON, RESET OR BUS DEVICE RESET =
OCCURRED<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
06/2A/01&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MODE =
PARAMETERS
CHANGED<span =
style=3D'text-transform:uppercase'><o:p></o:p></span></span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal style=3D'text-indent:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>A reading of the ANSI documentation =
regarding multiple
Unit Attention conditions only states that "Logical Unit may queue =
Unit
Attention conditions." (SAM-2, section =
5.9.5).<o:p></o:p></span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>We therefore have two =
questions:<o:p></o:p></span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal =
style=3D'mso-margin-top-alt:6.0pt;margin-right:0in;margin-bottom:
0in;margin-left:.75in;margin-bottom:.0001pt;text-indent:-.25in'><font =
size=3D3
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt'>1.</span></font><font
size=3D1><span style=3D'font-size:7.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></font>Is
our proposed reporting scheme legal from an ANSI standards =
viewpoint?<o:p></o:p></p>

<p class=3DMsoNormal =
style=3D'mso-margin-top-alt:6.0pt;margin-right:0in;margin-bottom:
0in;margin-left:.75in;margin-bottom:.0001pt;text-indent:-.25in'><font =
size=3D3
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt'>2.</span></font><font
size=3D1><span style=3D'font-size:7.0pt'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></font>Is
this (or a similar) scheme something ANSI wishes to add to the =
standards?<o:p></o:p></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

</blockquote>

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