Appendix D. Simplex-to-Duplex Conversion
Some models of controller enclosures and drive enclosures are available in either a simplex configuration
(one controller) or a duplex configuration (two controllers). You can convert a simplex configuration to a
duplex configuration by installing new nonvolatile static random access memory (NVSRAM) and a
second controller. This appendix explains how to convert a simplex configuration to a duplex
configuration by using CLI commands or by using the storage management software.
General steps
You can upgrade a controller enclosure or a drive enclosure that has a simplex configuration to a duplex
configuration by performing these tasks:
1.
Install new NVSRAM on the existing controller in your controller enclosure or drive enclosure.
2.
Revise the controller enclosure configuration or the drive enclosure configuration to run with two
controllers.
3.
Install a second controller.
4.
Connect the host cables.
5.
Connect the drive enclosure cables.
6.
Run diagnostics to make sure that your new configuration is running correctly.
Tools and Equipment
The procedures in this appendix require these items:
v
Anti-static protection
v
A No. 2 Phillips screwdriver
v
A second controller
v
Small Form-factor Pluggable (SFP) transceivers (for Fibre Channel configurations)
v
Host-to-controller cables
v
Controller-to-environmental services module (ESM) cables
Step 1 – Installing the duplex NVSRAM
Note:
Before trying to download NVSRAM, you must contact your Technical Support representative to
make sure that you are downloading the NVSRAM that is appropriate for the controller in your storage
subsystem.
NVSRAM files specify the default settings for the controller enclosure controllers or drive enclosure
controllers. Follow the instructions in this step to upgrade the NVSRAM on the controller in your
controller enclosure or your drive enclosure.
To get a copy of the latest NVSRAM, perform one of these tasks:
v
Download the duplex NVSRAM by using the command line interface.
v
Download the duplex NVSRAM by using the graphical user interface (GUI) of the storage
management software.
v
Copy the duplex NVSRAM from the installation CD in the conversion kit.
Ensure that the controller enclosure or the drive enclosure has an Optimal status. If one or more managed
devices has a Needs Attention status, determine and correct the condition that created the Needs
Attention status before proceeding with this conversion instruction.
© Copyright IBM Corp. 2008, 2012
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