HP 9000 Virtual Library System - Manual (Page 208)

4. Rotate the latch downward to about 45 degrees, supplying leverage to disconnect the power
module from the internal connector.
5. Use the latch to pull the power module out of the chassis.
NOTE: Do not lift the power module by the latch. This could break the latch. Hold the power
module by the metal casing.
6. Position the new power module so that AC connector and power switch are on the right side,
and slide the power module into the power module slot as far as it will go.
7. Rotate the latch upward so that it is flush against the power module to ensure that the connector
on the power module engages the connector inside the chassis.
8. Turn the thumbscrew at the top of the power module latch clockwise until it is finger-tight to
secure the latch to the power module.
9. Connect the AC power cord.
10. If the new power module has a power switch, set it to the On position.
11. Confirm that the AC Power Good LED on the replacement power supply is illuminated green.
See Rear Panel LEDs and Buttons .
12. Confirm that the DC-Fan fault/service required LED on the replacement power supply is off.
RAID or Expansion Controller
There are two controllers in each VLS disk array enclosure: either two RAID controllers or two
expansion controllers. Both controllers in a disk array enclosure operate during normal disk array
operation. If one of the controllers fails, the other controller takes over operation of the storage
system until you install a new controller. A controller can be hot-swapped, which means you can
replace one controller without halting I/O to the storage system or powering it off, as long the
other controller is operational.
208 Component Replacement