User`s guide

5
Removal and Installation Procedures
This chapter describes the procedures to remove and install the following field
replaceable units (FRUs) in the SW300-series redundant array of independent
disks (RAID) enclosure:
• StorageWorks building block (SBB) power supply or storage device
• Environmental monitor unit (EMU)
• Controller
• Dual speed blower
• AC power entry controller
5.1 Removing a Power Supply SBB
There are two methods for replacing power supply SBBs: the hot-swap method
and the cold-swap method. You must determine the appropriate replacement
method prior to replacing a power supply SBB.
The light emitting diodes (LEDs) on the front of the SBB indicate the status,
either operational or non-operational.
• For power supply SBBs, the hot-swap method can be used providing that
device is not active (that is, both LEDs are off).
• The cold-swap method is normally used during initial installation. The power
is removed from the enclosure assembly and all devices are inactive. None of
the devices is operational until the power is restored.
Use the following procedure to replace a power supply SBB:
CAUTION
The power supply SBB can be damaged if dropped. When removing or
replacing a power supply SBB, always use both hands to support its
weight.
To prevent electrostatic discharge (ESD) damage to an SBB, do not
touch the SBB connector.
1. Disconnect the power cord from the front of the power supply SBB.
2. Make sure that both LEDs on the power supply SBB are off.
3. As shown in Figure 5–1, press the two mounting tabs together to release the
power supply SBB from the shelf.
Removal and Installation Procedures 5–1