Installing an optional host port adapter or replacing a failed host port
adapter
Attention: If you install a host port adapter in a controller and the storage
subsystem contains two controllers, you must ensure that an identical host port
adapter is installed in the other controller.
Before you begin, ensure that you wear an anti-static wrist strap.
To install a host port adapter, complete the following steps.
Attention: When you add a host port adapter to an existing configuration the
subsystem must be powered off, and you must schedule maintenance time to
perform this task offline. To prevent data loss, you must shut down the storage
subsystem before you remove the controller from the chassis. For the correct
shutdown sequence, see “Turning off the storage subsystem” on page 95. However,
you do not have to power off the subsystem when replacing a failed host port
adapter in a dual controller subsystem.
1. Read the safety information that begins on page “Safety” on page ix and “Best
practices guidelines” on page 8.
2. If you are replacing a failed host port adapter, skip to the next step.
Otherwise, turn off the storage subsystem (see “Turning off the storage
subsystem” on page 95).
3. Label all of the cables that are connected to the controller, then disconnect
those cables.
4. Remove the controller from the chassis.
116 IBM System Storage DS3500 and EXP3500 Storage Subsystem: Installation, User's, and Maintenance Guide
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