Removing And Replacing A Controller - IBM DS3500 Installation, User's, And Maintenance Manual

4. If you have a single controller storage subsystem, skip this step and go to step
5. For a dual controller storage subsystem, follow these instructions:
v Is the OK TO REMOVE LED lit? If Yes, go to step 5
v If No, another component might require attention before you can remove
the controller. Run the Storage Manager Recovery Guru to identify and
correct any additional failures. To open Recovery Guru, click the Support
tab in the Subsystem Management window. See "Troubleshooting the
storage subsystem" on page 87 topic for information about using the
Recovery Guru.
If there are no additional failures, proceed with step 5 to replace the
controller.
Attention: Static electricity can damage the storage subsystem and other
electronic devices. To avoid damage, keep static-sensitive devices in their
static-protective packages until you are ready to install them.
5. Unpack the new controller. Save all packing materials in case you have to
return the new controller.
6. Determine whether the replacement controller will be controller A or
controller B (controller A is installed in the left controller bay; controller B is
installed in the right controller bay), and then apply the controller labels for
host ports and drive expansion ports to the replacement controller. In a
single-controller storage subsystem, the new controller will go into the same
slot, as the old one. The controller labels and instructions are included with
the replacement controller. Ensure that the labels are aligned correctly and do
not cover any connectors or LEDs.
Attention: Handle and install cables correctly to avoid degraded
performance or loss of communication with devices. See "Cabling the DS3500
storage subsystem" on page 31 for more information.
7. Disconnect all attached interface cables from the failed controller. Ensure that
you label each cable so that you can reconnect it correctly to the new
controller.
8. In a single-controller storage subsystem, shut down the storage subsystem (see
"Turning off the storage subsystem" on page 95 for the correct sequence of
steps). See Figure 7 on page 13 for an example of a single-controller Storage
Subsystem.
9. Remove the controller from the chassis.
Release
levers
Figure 91. Removing and replacing a controller
Chapter 5. Replacing components
111