Asus AP2500 Panduan Referensi Perangkat Keras - Halaman 18

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Halaman Cetak
II. System Components

Front Cooling Fan Control Board

The front cooling fans' main purpose is to cool the hard disk drives. These
fans also have a fan control board like the rear cooling fans. The front cool-
ing fan module consists of a control board, a hard disk drive LED status
board, and two cooling fans. The message LED board mounted in the front
of the cooling fan module consists of five sets of LEDs to represent the
status of up to five hard disk drives. Each set has three LEDs which shows
the power, activity, and status of each hard disk drive.
Gold Finger
Connector to the
SCSI Back plane
Board
Front cooling fan control board
Hard drive Status LED (Red)
Hard drive Access LED (Yellow)
Hard drive Power LED (Green)
Hard disk drive message board

Message LED Description

Power LED
Status LED Description
off
off
on
off
on
on
on
fast flash
on
slow flash
fast flash
on
fast flash
fast flash
* Must be provided by RAID controller's SAF-TE function.
18
LED Board Header
(For cable to connect to
fan board)
power subsystem OK and ready for hard drive insertion
Hard disk drive is OK for operation
Hard disk drive failure (*)
RAID in rebuilding (*)
Hot-spare hard disk drive (*)
Hard disk drive power failure/short circuit
Fan failure
AP2500 Hardware Reference Guide
3-pin Fan Header
pin 1
LED Board Header
(For cable to connect to
LED board)
pin 1