IBM Netfinity FASt T500 User Reference page 46

5
CAUTION:
The Power Control button on the device and the power switch on the power supply
do not turn off the electrical current supplied to the device. The device also might
have more than one power cord. To remove all electrical current from the device,
ensure that all power cords are disconnected from the power source.
4 Turn off both power switches and unplug the power cords from the controller unit, as
shown in Figure 8 on page
5 If you are shutting down the system, turn off the main circuit breakers or power
switches.
6 Disconnect the interface cables and label the host Fibre Channel cables.
Attention: Handle and install fiber-optic cables properly to avoid degraded performance
or loss of communications with devices. When working with fiber-optic
cables, do not pinch them, step on them, or locate them in aisles or
walkways. Do not overtighten the cable straps or bend the cables to a radius
smaller than 76 mm (3 in.).
7 Disconnect and label all remaining cables from the controller unit, so that you can
correctly reconnect them later.
Attention: When you handle electrostatic discharge (ESD) sensitive devices, take
precautions to avoid damage from static electricity. For details about
handling ESD-sensitive devices, refer to the following Web site and use a
search term of ESD: http://www.ibm.com/
8 Remove all CRUs from the controller unit. For information about removing and
replacing CRUs, see
9 Remove the two screws from the inside rear of the controller unit; then, remove the two
screws from the inside front of the controller unit. Save the four screws for later.
26 IBM Netfinity FAStT500 RAID Controller Enclosure Unit User's Reference
12.
"Chapter 3. Replacing controller unit components" on page 29.