SBC-2 items to obsolete

George Penokie gop at us.ibm.com
Mon Aug 30 09:52:34 PDT 2004


* From the T10 Reflector (t10 at t10.org), posted by:
* George Penokie <gop at us.ibm.com>
*
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IBM objects to obsoleting the following fields in the Caching Mode page
as we have systems that uses these fields to main a consistent caching
behavior between different vendors products. 

(5) These fields in Caching Mode page (6.3.3):
     (a) Non-cache segment size
     (b) Cache segment size
     (c) Number of cache segments
     (d) Maximum prefetch ceiling
     (e) Maximum prefetch
     (f) Minimum prefetch
     (g) Disable prefetch transfer length
     (h) Demand read retention priority
     (i) Write retention priority
     (j) LBCSS and DRA bits
     (k) the IC, ABPF, CAP, DISC, SIZE, MF, and RCD bits 

Bye for now,
George Penokie

Dept 2C6  114-2 N212
E-Mail:    gop at us.ibm.com
Internal:  553-5208
External: 507-253-5208   FAX: 507-253-2880





Jim.Coomes at seagate.com 
Sent by: owner-t10 at t10.org 


08/27/2004 04:29 PM 

To
t10 at t10.org 

cc

Subject
SBC-2 items to obsolete

	





* From the T10 Reflector (t10 at t10.org), posted by:
* Jim.Coomes at seagate.com
*




Seagate submitted a SBC-2 letter ballot comment to obsolete the
commands and functions listed below. These items are no longer
useful in SCSI products being developed today. As a result these
items should be obsoleted in SBC-2. Note that any of the
obsoleted functions may still be used in products however those
products would use SBC to determine the correct implementation of
the functions.

The editor intends to accept the comment if there are no
objections. Please post any objections to the reflector or by
prepared to discuss them in the Sept. CAP meeting.

(1) Prefetch (10) (5.7)
(2) Prefetch (16) (5.8)
(3) Lock Unlock Cache (10) (5.5)
(4) Lock Unlock Cache (16) (5.6)
(5) These fields in Caching Mode page (6.3.3):
     (a) Non-cache segment size
     (b) Cache segment size
     (c) Number of cache segments
     (d) Maximum prefetch ceiling
     (e) Maximum prefetch
     (f) Minimum prefetch
     (g) Disable prefetch transfer length
     (h) Demand read retention priority
     (i) Write retention priority
     (j) LBCSS and DRA bits
     (k) the IC, ABPF, CAP, DISC, SIZE, MF, and RCD bits


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<br><font size=2 face="sans-serif">IBM objects to obsoleting the following
fields in the Caching Mode page as we have systems that uses these fields
to main a consistent caching behavior between different vendors products.</font>
<br>
<br><font size=2><tt>(5) These fields in Caching Mode page (6.3.3):<br>
 &nbsp; &nbsp; &nbsp;(a) Non-cache segment size<br>
 &nbsp; &nbsp; &nbsp;(b) Cache segment size<br>
 &nbsp; &nbsp; &nbsp;(c) Number of cache segments<br>
 &nbsp; &nbsp; &nbsp;(d) Maximum prefetch ceiling<br>
 &nbsp; &nbsp; &nbsp;(e) Maximum prefetch<br>
 &nbsp; &nbsp; &nbsp;(f) Minimum prefetch<br>
 &nbsp; &nbsp; &nbsp;(g) Disable prefetch transfer length<br>
 &nbsp; &nbsp; &nbsp;(h) Demand read retention priority<br>
 &nbsp; &nbsp; &nbsp;(i) Write retention priority<br>
 &nbsp; &nbsp; &nbsp;(j) LBCSS and DRA bits<br>
 &nbsp; &nbsp; &nbsp;(k) the IC, ABPF, CAP, DISC, SIZE, MF, and RCD bits</tt></font>
<br><font size=2 face="sans-serif"><br>
Bye for now,<br>
George Penokie<br>
<br>
Dept 2C6 &nbsp;114-2 N212<br>
E-Mail: &nbsp; &nbsp;gop at us.ibm.com<br>
Internal: &nbsp;553-5208<br>
External: 507-253-5208 &nbsp; FAX: 507-253-2880<br>
<br>
</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>Jim.Coomes at seagate.com</b>
</font>
<br><font size=1 face="sans-serif">Sent by: owner-t10 at t10.org</font>
<p><font size=1 face="sans-serif">08/27/2004 04:29 PM</font>
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<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td valign=top><font size=1 face="sans-serif">t10 at t10.org</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">SBC-2 items to obsolete</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>
* Jim.Coomes at seagate.com<br>
*<br>
<br>
<br>
<br>
<br>
Seagate submitted a SBC-2 letter ballot comment to obsolete the<br>
commands and functions listed below. These items are no longer<br>
useful in SCSI products being developed today. As a result these<br>
items should be obsoleted in SBC-2. Note that any of the<br>
obsoleted functions may still be used in products however those<br>
products would use SBC to determine the correct implementation of<br>
the functions.<br>
<br>
The editor intends to accept the comment if there are no<br>
objections. Please post any objections to the reflector or by<br>
prepared to discuss them in the Sept. CAP meeting.<br>
<br>
(1) Prefetch (10) (5.7)<br>
(2) Prefetch (16) (5.8)<br>
(3) Lock Unlock Cache (10) (5.5)<br>
(4) Lock Unlock Cache (16) (5.6)<br>
(5) These fields in Caching Mode page (6.3.3):<br>
 &nbsp; &nbsp; &nbsp;(a) Non-cache segment size<br>
 &nbsp; &nbsp; &nbsp;(b) Cache segment size<br>
 &nbsp; &nbsp; &nbsp;(c) Number of cache segments<br>
 &nbsp; &nbsp; &nbsp;(d) Maximum prefetch ceiling<br>
 &nbsp; &nbsp; &nbsp;(e) Maximum prefetch<br>
 &nbsp; &nbsp; &nbsp;(f) Minimum prefetch<br>
 &nbsp; &nbsp; &nbsp;(g) Disable prefetch transfer length<br>
 &nbsp; &nbsp; &nbsp;(h) Demand read retention priority<br>
 &nbsp; &nbsp; &nbsp;(i) Write retention priority<br>
 &nbsp; &nbsp; &nbsp;(j) LBCSS and DRA bits<br>
 &nbsp; &nbsp; &nbsp;(k) the IC, ABPF, CAP, DISC, SIZE, MF, and RCD bits<br>
<br>
<br>
*<br>
* For T10 Reflector information, send a message with<br>
* 'info t10' (no quotes) in the message body to majordomo at t10.org<br>
</tt></font>
<br>
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