Rear Controls, Indicators, And Connectors; Power-Supply Controls, Indicators, Connectors - IBM Netfinity EXP300 Hardware Maintenance Manual

General-system-error LED (amber)
When lit, this amber LED indicates that the unit has a fault, such as in a power
supply, ESM board, or hard disk drive.
Bridge card bay
This is the location of the bridge card CRU.
Filler panel
Expansion units shipped without a full set of drives (14) contain filler panels
in the unused drive bays. Before installing new drives, you must remove the
filler panels and save them for later use. Each of the 14 bays must always
contain either a filler panel or a drive CRU.
Drive bays There are 14 drive bays that contain either a drive CRU or a filler panel.
Latch This multipurpose blue latch releases or locks the drive CRU in place.
Tray handle You can use this multipurpose handle to insert and remove a drive CRU
in the bay.
Fault LED (amber)
Each drive CRU has a fault LED. When lit, this amber LED indicates a drive
failure. When flashing, this amber LED indicates that a drive Identify or
Rebuild is in progress.
Activity LED (green)
Each drive CRU has an activity LED. When flashing, this green LED indicates
drive activity.
Drive CRU You can install up to 14 hot-swap drive CRUs in the expansion unit. Each
drive CRU consists of a hard disk drive and tray.

Rear controls, indicators, and connectors

Two hot-swap power supplies with built-in fans and two environmental services
monitor (ESM) boards are accessible from the back of the expansion unit. These
components contain several user indicators and connectors.

Power-supply controls, indicators, connectors

The following is a list of the controls, indicators, and connectors at back of the EXP300
expansion unit. A description of each item is included:
Handle
AC power LED (green)
DC power LED (green)
Fault LED (amber)
Thumbscrews Loosen the thumbscrews to remove or install a power supply.
Thumbscrews
AC power connector
Power
on/off
switch
Power
supply/Fan CRU
Thumbscrews
AC power connector
Power
on/off
switch
Power
supply/Fan CRU
Netfinity EXP300 Type 3531
Handle
15