IBM EXP15, Hardware Maintenance Manual

Page: 110 / 146

Front controls and indicators
The primary controls on the front of the expansion unit are
shown in the following illustration.
Activity LED
Drive CRU
Tray handle Latch
Fault LED
Power on LED
General system
error LED
Blank tray filler
Activity
LED: Each drive CRU has an Activity LED. When
flashing, this green LED indicates drive
activity. When completely on, this green
LED indicates the drive is properly installed.
Blank
tray
filler: Expansion units shipped without a full set of
drives (10) contain blank trays in the unused
drive bays. Before installing new drives, you
must remove the blank trays and save them.
Each of the 10 bays must always contain
either a blank tray or a drive CRU. Each
blank tray contains a filler piece for use with
a slim-line drive.
Drive
CRU: You can install up to 10 hot-swap drive
CRUs (customer replaceable units) in the
expansion unit. Each drive CRU consists of
a hard disk drive and tray.
Fault
LED: 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 process is in
progress.
General
system
error
LED: When lit, this amber LED indicates that the
unit has a fault, such as in a power supply,
fan unit, or hard disk drive.
Latch: This multipurpose blue latch releases or
locks the drive CRU in place.
Power-on
LED: When lit, this green light indicates that the
unit has good dc power.
Tray
handle: You can use this multipurpose handle to
insert and remove a drive CRU in the bay.
102
IBM Netfinity EXP15, EXP200, EXP500 HMM