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3
Removing and Replacing Components
Some enclosure components are hot-pluggable, while others should be replaced only after
you have disconnected the enclosure from the AC power source.
Table 3-1: Classification of Components
Hot-pluggable Not hot-pluggable
Mounting bracket covers (bezel ears)
Hard drive or drive blank
Power supply unit
Fan assembly
Controller module
Midplane board
Backplane board
UID circuit board
VRM power supply
Preventing Electrostatic Damage
A discharge of static electricity from a finger or other conductor might damage system boards
or other static-sensitive devices. This type of damage can reduce the life expectancy of the
device.
To prevent electrostatic damage when setting up the system or handling parts:
• Avoid hand contact by transporting and storing products in static-safe containers.
• Keep electrostatic-sensitive parts in their containers until they arrive at static-free
workstations.
• Place parts on a grounded surface before removing them from their containers.
• Avoid touching pins, leads, or circuitry.
• Always be properly grounded when touching a static-sensitive component or assembly.
Grounding Methods
There are several methods for grounding. Use one or more of the following methods when
handling or installing electrostatic-sensitive parts:
HP StorageWorks Modular Smart Array 20 Maintenance and Service Guide 3-1