Removing A Controller; Removing And Installing A Cover - IBM DS3500 Installation, User's, And Maintenance Manual

Removing a controller

Attention: Before you remove a controller in a single-controller storage subsystem, shut down the
storage subsystem to avoid data loss (see "Turning off the storage subsystem" on page 4-14).
To remove a controller from the storage subsystem, complete the following steps:
1. Read the safety information that begins on page "Safety" on page xi and "Best practices guidelines"
on page 1-7.
Attention: Never remove a controller unless the OK to remove LED is lit. Doing so can result in a
loss of data. See "Controller LEDs" on page 4-9 to see an illustration of the LED display array.
2. If the controller has failed, do not continue with this procedure. Instead, go to "Replacing a
controller" on page 5-5.
Attention: Handle and install cables correctly to avoid degraded performance or loss of
communication with devices. See "Cabling the DS3500 storage subsystem" on page 3-1 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.
Release
levers
Figure 5-1. Removing a controller
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.
DANGER
Electrical voltage and current from power cables are hazardous. To avoid a shock hazard,
always place electrical equipment on dry, static-free level surfaces. Never turn on any
electrical equipment when there is evidence of fire, water, or structural damage.
c. Place the controller on a dry, static-free level surface.
Attention: After you remove a controller, wait 70 seconds before you reseat or replace the controller.
Failure to do so might cause unpredictable results.

Removing and installing a cover

To remove a cover from a controller, complete the following steps:
5-2
System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide