ADC-2 Question regarding.

Halvard Eriksen halvard.eriksen at tandberg.com
Mon Jan 30 23:53:35 PST 2006


* From the T10 Reflector (t10 at t10.org), posted by:
* "Halvard Eriksen" <halvard.eriksen at tandberg.com>
*
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Rod and Kevin.

=20

Thanks for the comments to my question.

=20

I believe that if we put in restrictions like this in the standard, we
should

apply these restrictions to all parameters that, if they are changed
|from the

primary port, will be cutting off the primary port access to the
different device servers.

This includes the enable bits for all the device servers, and the
primary port enable bit.

=20

Unless someone objects, I will make a formal proposal for a change that
we can discuss=20

during the Mach meeting.

=20

Halvard Eriksen

Tandberg Data ASA

=20

=20

  _____ =20

From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Rod
Wideman
Sent: 30. januar 2006 20:35
To: Halvard Eriksen; t10 at t10.org
Subject: RE: ADC-2 Question regarding.

=20

Halvard,

=20

This restriction is unique to the SMC logical unit descriptor, and
exists so that access to the local SMC device server (i.e., a bridged
media changer) cannot be inadvertently disabled via the DT device
primary port.  At the time, this text was developed from the perspective
that primary access to the ADC device server would be via an ADT port,
but it's probably reasonable to consider extending this restriction to
attempted changes of the bit for at least the ADC descriptor (i.e., if
an ADT port is not being used to access the ADC device server, it's
probably not wise to disable the primary port via the primary port...).

=20

Rod Wideman

ADIC

=20

	-----Original Message-----
	From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of
Halvard Eriksen
	Sent: Wednesday, January 25, 2006 11:19 AM
	To: t10 at t10.org
	Subject: ADC-2 Question regarding.

	To:        ADI-2 working group members.

	From;    Halvard Eriksen, Tandberg Data ASA.

	.

	We have encountered a small problem in ADC-2 in chapter
6.2.2.4.3 SMC logical unit descriptor format.

	=20

	In the paragraph next in front of the last, it is stated that:

	 "If the ADC device server receives a MODE SELECT command via a
DT device primary port, and the parameter

	data would change the ENABLE bit, the ADC device server shall
return Check Condition ........"

	=20

	I assume the ENABLE bit in question is the one in the SMC
logical unit descriptor.=20

	=20

	Why is it not the same for the ENABLE bits in the RMC and the
ADC logical unit descriptor.

	Why is the SMC ENABLE bit special.

	Can someone that took part in the discussion resulting in this
text kindly help me with an explanation?

	=20

	If required, I would like to have a short discussion on this
subject during the March ADI meeting.

	Should it be required to make a formal proposal for a change in
the standard, I am willing to

	do that based on next meeting discussion.

	=20

	Regards

	Halvard Eriksen

	Tandberg Data ASA.

	=20


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<div class=3DSection1>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Rod and =
Kevin.<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 =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>Thanks for the =
comments
to my question.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DEN-GB
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 =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>I believe that =
if we put in
restrictions like this in the standard, we =
should<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>apply these =
restrictions
to all parameters that, if they are changed from =
the<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>primary port, =
will be
cutting off the primary port access to the different device =
servers.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>This includes =
the enable
bits for all the device servers, and the primary port enable =
bit.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DEN-GB
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 =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>Unless someone =
objects, I
will make a formal proposal for a change that we can discuss =
<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>during the Mach =
meeting.<o:p></o:p></span></font></p>

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

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:navy'>Tandberg Data =
ASA<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
lang=3DEN-GB
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 =
lang=3DEN-GB
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 lang=3DEN-US 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 lang=3DEN-US
style=3D'font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</spa=
n></font></b><font
size=3D2 face=3DTahoma><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Tahoma'>
owner-t10 at t10.org [mailto:owner-t10 at t10.org] <b><span =
style=3D'font-weight:bold'>On
Behalf Of </span></b>Rod Wideman<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> 30. januar 2006 =
20:35<br>
<b><span style=3D'font-weight:bold'>To:</span></b> Halvard Eriksen; =
t10 at t10.org<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> RE: ADC-2 =
Question
regarding.</span></font><span lang=3DEN-US><o:p></o:p></span></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><font size=3D2 color=3Dblue face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>Halvard,</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'>This restriction is unique to the =
SMC
logical unit descriptor, and exists so that access to the local SMC =
device
server (i.e., a bridged media changer) cannot be inadvertently disabled =
via the
DT device primary port.&nbsp; At the time, this text was developed from =
the
perspective that primary access to the ADC device server would be via an =
ADT
port, but it's probably reasonable to consider extending this =
restriction to
attempted changes of the bit for at least the ADC descriptor (i.e., if =
an ADT
port is not being used to access the ADC device server, it's probably =
not wise
to disable the primary port via the primary =
port...).</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'>Rod =
Wideman</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'>ADIC</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>

<blockquote =
style=3D'margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>

<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><font size=3D2 =
face=3DTahoma><span
lang=3DEN-US 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>Halvard
Eriksen<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Wednesday, January =
25, 2006
11:19 AM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> t10 at t10.org<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> ADC-2 Question =
regarding.</span></font><span
lang=3DEN-US><o:p></o:p></span></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>To:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
ADI-2
working group members.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>From;&nbsp;&nbsp;&nbsp; Halvard Eriksen, Tandberg =
Data ASA.<o:p></o:p></span></font></p>

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

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>We have encountered a small problem in ADC-2 =
in
chapter 6.2.2.4.3 SMC logical unit descriptor =
format.<o:p></o:p></span></font></p>

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

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>In the paragraph next in front of the last, it =
is
stated that:<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>&nbsp;&#8220;If the ADC device server receives =
a MODE
SELECT command via a DT device primary port, and the =
parameter<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>data would change the ENABLE bit, the ADC =
device
server shall return Check Condition =
&#8230;&#8230;..&#8221;<o:p></o:p></span></font></p>

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

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>I assume the ENABLE bit in question is the one =
in the
SMC logical unit descriptor. <o:p></o:p></span></font></p>

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

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Why is it not the same for the ENABLE bits in =
the RMC
and the ADC logical unit descriptor.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Why is the SMC ENABLE bit =
special.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Can someone that took part in the discussion
resulting in this text kindly help me with an =
explanation?<o:p></o:p></span></font></p>

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

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>If required, I would like to have a short =
discussion
on this subject during the March ADI =
meeting.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Should it be required to make a formal =
proposal for a
change in the standard, I am willing to<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>do that based on next meeting =
discussion.<o:p></o:p></span></font></p>

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

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

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Halvard Eriksen<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
10.0pt;font-family:Arial'>Tandberg Data =
ASA.<o:p></o:p></span></font></p>

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

</blockquote>

</div>

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