Removing a controller
About this task
To remove a controller from the storage subsystem, complete the following steps:
Procedure
1. Read the safety information and best practices information found in the prolog of this document.
Attention: Never remove a controller unless the Service Action Allowed LED is lit. Doing so can
result in a loss of data.
2. If the controller has failed, do not continue with this procedure. Instead, go to “Replacing a
controller” on page 91.
Attention: Handle and install cables correctly to avoid degraded performance or loss of
communication with devices. See Chapter 3 "Cabling the DCS3700" in this document for more
information.
3. Disconnect all attached interface cables from the controller. Be sure to label each cable so that you can
reconnect it correctly.
4. Remove the controller from the chassis.
a. Open the two release levers as shown in the illustration. The controller moves out of the bay
approximately 0.6 cm (0.25 inch).
b. Pull the controller out of the bay.
c. Place the controller on a level surface.
Results
Attention: After you remove a controller, wait 90 seconds before you reseat or replace the controller.
Failure to do so might cause unpredictable results.
Figure 59. Removing a controller
90 IBM System Storage DCS3700: Installation, User, and Maintenance Guide
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