FC-TAPE and/or FCP-3

Kevin D Butt kdbutt at us.ibm.com
Fri Oct 1 08:49:19 PDT 2004


* From the T10 Reflector (t10 at t10.org), posted by:
* Kevin D Butt <kdbutt at us.ibm.com>
*
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Lawrence, 

The SSB is part of the Exchange Status Block which is part of the RES
which is supported on IBM Tape drives. 

Thanks, 

Kevin D. Butt
Fibre Channel & SCSI Architect, IBM Tape Microcode, 
6TYA, 9000 S. Rita Rd., Tucson, AZ  85744
Tie-line 321; Office: 520-799-5280, Lab: 799-5751, Fax: 799-4138, Email:
kdbutt at us.ibm.com 



"Lawrence Chen" <LawrenceChen at MaXXan.com> 
Sent by: owner-t10 at t10.org 


09/30/2004 04:43 PM 

To
"Scsi_Reflector (E-mail)" <t10 at t10.org> 

cc

Subject
FC-TAPE and/or FCP-3

	





* From the T10 Reflector (t10 at t10.org), posted by:
* "Lawrence Chen" <LawrenceChen at MaXXan.com>
*

Hi Tape folks,

I am forwarding an email thread about ELS Read Sequence Status (RSS)
and Sequence Status Block (SSB).

To make a long story short, there is an error in the SSB which is
returned in the RSS LS_ACC. Since FC-TAPE states that RSS is A(llowed),
there was a concern raised on whether or not any tape vendor supports
RSS.

Best Regards,

Lawrence Chen

Principal Member of Technical Staff (PMTS)
MaXXan Systems, Inc.

(408) 382-6427 (V)
(832) 382-6599 (F)
(408) 204-2460 (C)

LawrenceChen at maxxan.com


-----Original Message-----
From: Bob.Nixon at Emulex.Com [mailto:Bob.Nixon at Emulex.Com]
Sent: Thursday, September 30, 2004 4:20 PM
To: Lawrence Chen; Jim.Coomes at seagate.com
Cc: Bob.Nixon at Emulex.Com
Subject: RE: [T11.3] Re: FC-FS-2


Hello, Lawrence, I'm afraid I don't have the knowledge to give you a
meaningful answer. (Implicitly, I guess that means I don't know any
8-)

If it's important, you might want to try sending the question to the T10
reflector, and tagging its subject as an FCP-3 question.

Sorry.
  - Bob

-----Original Message-----
From: Lawrence Chen [mailto:LawrenceChen at MaXXan.com]
Sent: Wednesday, September 29, 2004 11:37 AM
To: Nixon, Bob; Jim.Coomes at seagate.com
Subject: RE: [T11.3] Re: FC-FS-2


Hi Jim and Bob,

I just checked FC-TAPE profile for RSS ELS. FC-TAPE states that RSS is
A(llowed).
Do you know any tape vendors that are supporting RSS?

By the way, I do not plan on pursuing this any further.

Best Regards,

Lawrence Chen

Principal Member of Technical Staff (PMTS)
MaXXan Systems, Inc.

(408) 382-6427 (V)
(832) 382-6599 (F)
(408) 204-2460 (C)

LawrenceChen at maxxan.com


-----Original Message-----
From: Bob.Nixon at Emulex.Com [mailto:Bob.Nixon at Emulex.Com]
Sent: Monday, September 27, 2004 9:20 AM
To: Jim.Coomes at seagate.com; Lawrence Chen
Cc: Bob.Nixon at Emulex.Com
Subject: RE: [T11.3] Re: FC-FS-2


It is my belief that the issue is resolved by its long history: the
change at issue was approved in 1999. No proposals to change this have
been brought forward, though Larry may decide to pursue that path. My
proposal 04-611v0, submitted for discussion at the next FC-LS meeting,
clarifies the status quo.

Thanks!
  - Bob

-----Original Message-----
From: Jim.Coomes at seagate.com [mailto:Jim.Coomes at seagate.com]
Sent: Monday, September 27, 2004 8:46 AM
To: 'LawrenceChen at MaXXan.com'; Nixon, Bob
Subject: [T11.3] Re: FC-FS-2






Larry, Bob

Is this issue with RSS LS_ACC payload resolved or does it need time on
the
FC-LS agenda?

Jim
----- Forwarded by Jim Coomes/Seagate on 09/27/2004 10:31 AM -----
 

                     "Nixon, Bob"

                     <Bob.Nixon at Emulex.Com>         To:
"'LawrenceChen at MaXXan.com'" <LawrenceChen at MaXXan.com>, "T11. 3_Reflector

                     Sent by:                        (E-mail)"
<t11_3 at mail.t11.org>

                     t11_3-bounce at mailman.li        cc:

                     stserve.com                    Subject:  [T11.3]
Re: FC-FS-2                                                           
                     No Phone Info Available

 

                     08/13/2004 03:27 PM

                     Please respond to

                     Bob.Nixon

 

 





INCITS T11.3 Mail Reflector
********************************
I made a misstatement below.

An entire SSB is included in the LS_ACC to an RSS ELS, so the SSB format
is
fully constrained by standard (see FC-LS).

  - Bob

-----Original Message-----
From: Nixon, Bob
Sent: Friday, August 13, 2004 12:57 PM
To: 'LawrenceChen at MaXXan.com'; T11. 3_Reflector (E-mail)
Subject: [T11.3] Re: FC-FS-2


INCITS T11.3 Mail Reflector
********************************
Hi, Larry,
Indeed, that change was definitely prior to FC-FS-2 being initiated! It
was
made between FC-FS version 0.00 (March 4, 1999) and version 0.10 (July
28,
1999), and has remained the same since then.  Because this change has
been
so long established, I would hesitate to further modify the standard,
despite the good reasons you give that it should have been done
differently.

However, I note that the SSB is described as a "logical construct" and
that
only the first eight bytes of the SSB appear anywhere in a standard
interface.  Unless that changes, an implementation is actually not
constrained by the standard as to how it internally maintains the
trailing
half of the SSB.

Hope that helps!
  - Bob Nixon, FC-FS-2 editor

-----Original Message-----
From: Lawrence Chen [mailto:LawrenceChen at MaXXan.com]
Sent: Friday, August 13, 2004 12:15 PM
To: T11. 3_Reflector (E-mail)
Subject: [T11.3] FC-FS-2


INCITS T11.3 Mail Reflector
********************************

Table 73 - Sequence Status Block

Frame Header Word 1, bits 31-24 field of 1 Byte (CS_CTL/Priority)
field was added prior to FC-FS-2 being initiated.

When this above field was originally added, I believe the last reserved
field of
the Sequence Status Block should have been used instead of just adding
the
above field into the middle of the structure i.e., the size and
alignment
of
the
Sequence Status Block was not properly maintained.

Best Regards,

Lawrence Chen

Principal Member of Technical Staff (PMTS)
MaXXan Systems, Inc.

(408) 382-6427 (V)
(832) 382-6599 (F)
(408) 204-2460 (C)

LawrenceChen at maxxan.com


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may contain confidential information. Any unauthorized use; review,
disclosure or distribution is prohibited. If you are not the intended
recipient, please contact the sender by return email and destroy all
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Copyright  2004 MaXXan Systems, Inc. All rights reserved.


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may contain confidential information. Any unauthorized use; review,
disclosure or distribution is prohibited. If you are not the intended
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Copyright  2004 MaXXan Systems, Inc. All rights reserved.
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<br><font size=2 face="sans-serif">Lawrence,</font>
<br>
<br><font size=2 face="sans-serif">The SSB is part of the Exchange Status
Block which is part of the RES which is supported on IBM Tape drives.</font>
<br>
<br><font size=2 face="sans-serif">Thanks,</font>
<br><font size=2 face="sans-serif"><br>
Kevin D. Butt<br>
Fibre Channel &amp; SCSI Architect, IBM Tape Microcode, <br>
6TYA, 9000 S. Rita Rd., Tucson, AZ &nbsp;85744<br>
Tie-line 321; Office: 520-799-5280, Lab: 799-5751, Fax: 799-4138, Email:
kdbutt at us.ibm.com</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>"Lawrence Chen"
<LawrenceChen at MaXXan.com&gt;</b> </font>
<br><font size=1 face="sans-serif">Sent by: owner-t10 at t10.org</font>
<p><font size=1 face="sans-serif">09/30/2004 04:43 PM</font>
<td width=59%>
<table width=100%>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td valign=top><font size=1 face="sans-serif">"Scsi_Reflector (E-mail)"
<t10 at t10.org&gt;</font>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td valign=top>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td valign=top><font size=1 face="sans-serif">FC-TAPE and/or FCP-3</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=2><tt>* From the T10 Reflector (t10 at t10.org), posted by:<br>
* "Lawrence Chen" <LawrenceChen at MaXXan.com&gt;<br>
*<br>
<br>
Hi Tape folks,<br>
<br>
I am forwarding an email thread about ELS Read Sequence Status (RSS)<br>
and Sequence Status Block (SSB).<br>
<br>
To make a long story short, there is an error in the SSB which is<br>
returned in the RSS LS_ACC. Since FC-TAPE states that RSS is A(llowed),<br>
there was a concern raised on whether or not any tape vendor supports<br>
RSS.<br>
<br>
Best Regards,<br>
<br>
Lawrence Chen<br>
<br>
Principal Member of Technical Staff (PMTS)<br>
MaXXan Systems, Inc.<br>
<br>
(408) 382-6427 (V)<br>
(832) 382-6599 (F)<br>
(408) 204-2460 (C)<br>
<br>
LawrenceChen at maxxan.com<br>
<br>
<br>
-----Original Message-----<br>
From: Bob.Nixon at Emulex.Com [mailto:Bob.Nixon at Emulex.Com]<br>
Sent: Thursday, September 30, 2004 4:20 PM<br>
To: Lawrence Chen; Jim.Coomes at seagate.com<br>
Cc: Bob.Nixon at Emulex.Com<br>
Subject: RE: [T11.3] Re: FC-FS-2<br>
<br>
<br>
Hello, Lawrence, I'm afraid I don't have the knowledge to give you a meaningful
answer. (Implicitly, I guess that means I don't know any &nbsp; 8-)<br>
<br>
If it's important, you might want to try sending the question to the T10
reflector, and tagging its subject as an FCP-3 question.<br>
<br>
Sorry.<br>
 &nbsp; - Bob<br>
<br>
-----Original Message-----<br>
From: Lawrence Chen [mailto:LawrenceChen at MaXXan.com]<br>
Sent: Wednesday, September 29, 2004 11:37 AM<br>
To: Nixon, Bob; Jim.Coomes at seagate.com<br>
Subject: RE: [T11.3] Re: FC-FS-2<br>
<br>
<br>
Hi Jim and Bob,<br>
<br>
I just checked FC-TAPE profile for RSS ELS. FC-TAPE states that RSS is
A(llowed).<br>
Do you know any tape vendors that are supporting RSS?<br>
<br>
By the way, I do not plan on pursuing this any further.<br>
<br>
Best Regards,<br>
<br>
Lawrence Chen<br>
<br>
Principal Member of Technical Staff (PMTS)<br>
MaXXan Systems, Inc.<br>
<br>
(408) 382-6427 (V)<br>
(832) 382-6599 (F)<br>
(408) 204-2460 (C)<br>
<br>
LawrenceChen at maxxan.com<br>
<br>
<br>
-----Original Message-----<br>
From: Bob.Nixon at Emulex.Com [mailto:Bob.Nixon at Emulex.Com]<br>
Sent: Monday, September 27, 2004 9:20 AM<br>
To: Jim.Coomes at seagate.com; Lawrence Chen<br>
Cc: Bob.Nixon at Emulex.Com<br>
Subject: RE: [T11.3] Re: FC-FS-2<br>
<br>
<br>
It is my belief that the issue is resolved by its long history: the change
at issue was approved in 1999. No proposals to change this have been brought
forward, though Larry may decide to pursue that path. My proposal 04-611v0,
submitted for discussion at the next FC-LS meeting, clarifies the status
quo.<br>
<br>
Thanks!<br>
 &nbsp; - Bob<br>
<br>
-----Original Message-----<br>
From: Jim.Coomes at seagate.com [mailto:Jim.Coomes at seagate.com]<br>
Sent: Monday, September 27, 2004 8:46 AM<br>
To: 'LawrenceChen at MaXXan.com'; Nixon, Bob<br>
Subject: [T11.3] Re: FC-FS-2<br>
<br>
<br>
<br>
<br>
<br>
<br>
Larry, Bob<br>
<br>
Is this issue with RSS LS_ACC payload resolved or does it need time on
the<br>
FC-LS agenda?<br>
<br>
Jim<br>
----- Forwarded by Jim Coomes/Seagate on 09/27/2004 10:31 AM -----<br>
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&nbsp;"Nixon, Bob" &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
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&nbsp;<Bob.Nixon at Emulex.Com&gt; &nbsp; &nbsp; &nbsp; &nbsp; To: &nbsp;
&nbsp; &nbsp; "'LawrenceChen at MaXXan.com'&quot; <LawrenceChen at MaXXan.com&gt;,
"T11. 3_Reflector &nbsp; &nbsp; &nbsp;<br>
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;Sent by: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp;(E-mail)" <t11_3 at mail.t11.org&gt; &nbsp;
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 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;t11_3-bounce at mailman.li &nbsp; &nbsp; &nbsp; &nbsp;cc: &nbsp; &nbsp;
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&nbsp;stserve.com &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp;Subject: &nbsp;[T11.3] Re: FC-FS-2 &nbsp; &nbsp; &nbsp; &nbsp;
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&nbsp;No Phone Info Available &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
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 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;08/13/2004 03:27 PM &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
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 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp;Please respond to &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
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INCITS T11.3 Mail Reflector<br>
********************************<br>
I made a misstatement below.<br>
<br>
An entire SSB is included in the LS_ACC to an RSS ELS, so the SSB format
is<br>
fully constrained by standard (see FC-LS).<br>
<br>
 &nbsp; - Bob<br>
<br>
-----Original Message-----<br>
From: Nixon, Bob<br>
Sent: Friday, August 13, 2004 12:57 PM<br>
To: 'LawrenceChen at MaXXan.com'; T11. 3_Reflector (E-mail)<br>
Subject: [T11.3] Re: FC-FS-2<br>
<br>
<br>
INCITS T11.3 Mail Reflector<br>
********************************<br>
Hi, Larry,<br>
Indeed, that change was definitely prior to FC-FS-2 being initiated! It
was<br>
made between FC-FS version 0.00 (March 4, 1999) and version 0.10 (July
28,<br>
1999), and has remained the same since then. &nbsp;Because this change
has been<br>
so long established, I would hesitate to further modify the standard,<br>
despite the good reasons you give that it should have been done<br>
differently.<br>
<br>
However, I note that the SSB is described as a "logical construct"
and that<br>
only the first eight bytes of the SSB appear anywhere in a standard<br>
interface. &nbsp;Unless that changes, an implementation is actually not<br>
constrained by the standard as to how it internally maintains the trailing<br>
half of the SSB.<br>
<br>
Hope that helps!<br>
 &nbsp; - Bob Nixon, FC-FS-2 editor<br>
<br>
-----Original Message-----<br>
From: Lawrence Chen [mailto:LawrenceChen at MaXXan.com]<br>
Sent: Friday, August 13, 2004 12:15 PM<br>
To: T11. 3_Reflector (E-mail)<br>
Subject: [T11.3] FC-FS-2<br>
<br>
<br>
INCITS T11.3 Mail Reflector<br>
********************************<br>
<br>
Table 73 - Sequence Status Block<br>
<br>
Frame Header Word 1, bits 31-24 field of 1 Byte (CS_CTL/Priority)<br>
field was added prior to FC-FS-2 being initiated.<br>
<br>
When this above field was originally added, I believe the last reserved<br>
field of<br>
the Sequence Status Block should have been used instead of just adding
the<br>
above field into the middle of the structure i.e., the size and alignment<br>
of<br>
the<br>
Sequence Status Block was not properly maintained.<br>
<br>
Best Regards,<br>
<br>
Lawrence Chen<br>
<br>
Principal Member of Technical Staff (PMTS)<br>
MaXXan Systems, Inc.<br>
<br>
(408) 382-6427 (V)<br>
(832) 382-6599 (F)<br>
(408) 204-2460 (C)<br>
<br>
LawrenceChen at maxxan.com<br>
<br>
<br>
This email message is for the sole use of the intended recipient(s) and
may<br>
contain confidential information. Any unauthorized use; review, disclosure<br>
or distribution is prohibited. If you are not the intended recipient,<br>
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