ITEM: AP1187L
Setting node number for 7133 SSA router
ENV: AIX 3.2.5, SP2 with 4 nodes and 7133 SSA drives
DESC: They would like to hook the 7133 between two nodes. The manual
says that they need to configure the ssar node number if they go
to multiple hosts. There is nothing in the book SC23-2775 "IBM SSA
4-Port Adapter, Installation and Reference" on how to set this up.
No special smit screens install when they install the software.
ACT: On page 5-14 it states:
"When the SSA disk device driver switches from one adapter to another
to communicate with a disk, it issues a command to break the SCSI
Reserve condition on the disk. If there are multiple hosts connected
to the disk, SSA SCSI reserve should not be used as a sole method for
controling access to the disk. Fencing has been provided as an
alternative method for controlling access to disk in a multi-host
environment."
On pg. 5-38 it states:
"In order to use fencing, the node_number attribute of the ssar
router must be set to a different value on each host which is
participating in fencing. Note that after setting node_number
the host must be rebooted for the new value to take effect."
The book does not describe how to make this change. Fencing is
used with HACMP in concurrent mode operation; thus changing the
node_number is only needed when this is the case.
On page 5-16, it states that node_number is an attribute of
the ssar device. Thus the method to change it would be:
\# chdev -l ssar -a node_number=1
to change the node number to 1, e.g.. The ssar device is always
in the Defined state so no child devices need to be placed in
the Defined state to make the change.
To hook up a 7133 between 2 nodes requires no special configuration
if HACMP with concurrent access is not used.
Once the 7133 is cabled into the loop (with or without 2 adapters)
and the 7133 is powered on, the SSA adapter configures the loop
(you will see the disk drive lights flashing during this). Once this
is completed, they can run "cfgmgr" to load the ODM with information
about the pdisks and hdisks. They need to run cfgmgr from both hosts.
One should also have the following filesets installed:
ssa.diag.obj 03.02.00.00
ssa.rte.obj 03.02.00.00
ssadisk.obj 03.02.00.00
ssadiskmc.mc 03.02.00.00
/ > lslpp -l ssa.diag.obj
Name State Description
-------------------- ------------ -------------------------------
Path: /usr/lib/objrepos
ssa.diag.obj 03.02.00.00
APPLIED SSA Adapter (8f97) Diagnostics
Path: /etc/objrepos
ssa.diag.obj 03.02.00.00
APPLIED SSA Adapter (8f97) Diagnostics
/ > lslpp -l ssa.rte.obj
Name State Description
-------------------- ------------ --------------------------------
Path: /usr/lib/objrepos
ssa.rte.obj 03.02.00.00
APPLIED SSA Adapter (8f97) Software
Path: /etc/objrepos
ssa.rte.obj 03.02.00.00
APPLIED SSA Adapter (8f97) Software
/ > lslpp -l ssadisk.obj
Name State Description
-------------------- ------------ -------------------------------
Path: /usr/lib/objrepos
ssadisk.obj 03.02.00.00
APPLIED SSA DASD Software
Path: /etc/objrepos
ssadisk.obj 03.02.00.00
/ > lslpp -l ssadiskmc.mc
Name State Description
-------------------- ------------ --------------------------------
Path: /usr/lib/objrepos
ssadiskmc.mc 03.02.00.00
COMMITTED SSA DASD Microcode
The following letter was also sent to all customers regarding a
7133 defect:
Next week, IBM will be mailing the attached letter to your
customers of record who installed the subject adapter on their
RS/6000 system. It is recommended that all customers with
the SSA 4-Port adapter (IBM Feature Code \#6214) install
Engineering Change (EC) 212, to eliminate the possibility of
them experiencing data corruption on their systems.
This EC is being made available three ways:
1) it is being send to each Field Branch office as a mandatory
EC \# ECA212.
2) it can be downloaded form AIXTOOLS, package named ECA212.
3) it can be ordered as a PTF. The PTF numbers are:
a. PTF U440259 for AIX 3.2.5.1
b. PTF U440347 for AIX 4.1.4
While all customers will be notified by mail, AIXTOOLS is
the fastest way to access the EC. If possible,
it is recommended that client reps and marketing
specialists as well as field engineering download the EC package
from AIXTOOLS, to expedite getting the EC to their
customers.
*********************************************************************
November 10, 1995
Subject: IBM Serial Storage Architecture 4-Port Adapter
Dear IBM RISC System/6000 and RISC System/6000 SP Customer,
Today we are informing you of the availability of an Engineering
Change (EC) that provides a software update for systems which use
the Serial Storage Architecture (SSA) 4-Port Adapter. The EC
will eliminate the possibility that a RS/6000 with AIX 3.2.5.1 or
4.1.4 installed, could experience data corruption due to using an
SSA product attached via the IBM SSA 4-Port Adapter (IBM Feature
Code \# 6214).
We urge you to install the no-charge EC at your earliest conven-
ience. It can be installed in about 15 minutes, after which the
system will require a re-boot.
Our records show that one or more of your machines may have the
SSA 4-Port Adapter installed, and the EC should be applied to
those machines.
Your IBM Service Representative will receive the Engineering
Change for your system(s) and make it available to you shortly.
Should you wish to speak with your Service Representative about
this EC, please call your IBM Service Center at 1-800-IBM-SERV
(1-800-426-7378) (other numbers per geography) and mention that
you want to discuss ECA 212, as referenced in RETAIN Tip XXXXXX.
If you have sold or transferred any of the affected machines to
another party, please forward this notice to them.
Thank you for your cooperation.
Support Line: Setting node number for 7133 SSA router ITEM: AP1187L
Dated: December 1995 Category: N/A
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