When Sun StorEdge [TM] T3 (T3B) 2.x firmware is upgraded to 3.1,the sys parameter "rd

Asset ID:	1-71-1007958.1
Update Date:	2009-03-09
Keywords:

Solution Type Technical Instruction Sure

Solution 1007958.1 : When Sun StorEdge [TM] T3 (T3B) 2.x firmware is upgraded to 3.1,the sys parameter "rd_ahead" is always turned off

Related Items


Sun Storage T3+ Array

Related Categories


GCS>Sun Microsystems>Storage - Disk>Modular Disk - Other

PreviouslyPublishedAs
210977

Description
When T3B 2.x firmware is upgraded,the sys parameter "rd_ahead"
is turned off regardless of the previous setting.

Steps to Follow
The T3B firmware was 2.x and rd_ahead parameter was set on.

The following table describes the effect on the value of the
rd_ahead parameter after a firmware upgrade:
-------------------------------
From     To     "rd_ahead"
-------------------------------
2.1.4    2.1.6   on
2.1.6    3.1.2   off
2.1.6    3.1.4   off
2.1.6    3.1.6   off
3.1.2    3.1.6   on
3.1.4    3.1.6   on
-------------------------------
*The previous setting was on.
The test results show this phenomenon doesn't happen
when the firmware is upgraded from 3.x to above version.
So, this problem doesn't affect 6120 arrays.
==============================================
t3:/:<1>ver
T3B Release 2.01.06 2003/11/06 14:59:41 (129.158.60.67)
Copyright (C) 1997-2001 Sun Microsystems, Inc.
All Rights Reserved.
t3:/:<2>sys list
blocksize          : 64k
cache              : auto
mirror             : auto
mp_support         : rw
naca               : off
rd_ahead           : on         <==== check the parameter
recon_rate         : med
sys memsize        : 128 MBytes
cache memsize      : 1024 MBytes
enable_volslice    : off
fc_topology        : auto
==============================================
After upgrading firmware to 3.1 revision,the "rd_ahead" parameter
is turned off regardless of the previous setting.
==============================================
t3:/:<1>ver
T3B Release 3.1.6 Thu Feb  3 16:39:28 PST 2005 (129.158.60.67)
Copyright (C) 1997-2003 Sun Microsystems, Inc.
All Rights Reserved.
t3d2u7:/:<2>sys list
controller         : 2.0
blocksize          : 64k
cache              : auto
mirror             : auto
mp_support         : rw
naca               : off
rd_ahead           : off         <==== check the parameter
recon_rate         : med
sys memsize        : 128 MBytes
cache memsize      : 1024 MBytes
enable_volslice    : off
fc_topology        : auto
fc_speed           : 1Gb
disk_scrubber      : on
ondg               : befit
==============================================
The rd_ahead parameter must be manually set to "on"
again if this setting is required.
t3:/:<1>sys rd_ahead on

Product
Sun StorageTek T3+/6X20 Controller Firmware 3.1
Sun StorageTek T3+ Array

T3+, T3B, firmware, rd_ahead, 3.1, 2.x, upgrade
Previously Published As
81835

Change History
Date: 2005-06-15
User Name: 31620
Action: Approved
Comment: Verified Metadata -
Verified Keywords -
Verified still correct for audience - currently set to contract
Audience left at contract as per FvF http://kmo.central/howto/FvF.html
Checked review date - currently set to 2006-06-07
Checked for TM - needed Sun StorEdge [TM] T3 adding to correct the title.

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