2.9.3 SCSI backplane connections

(in AS8 and AS4 models only)

Two SCSI backplanes come pre-installed in the AP1720-E2 AS8 model. One SCSI backplane comes pre-installed in the AS4 model. The SCSI backplane has four 68-pin SCSI connectors to support SCA SCSI hard disks. The backplane design incorporates a hot swap feature to allow easy connection or removal of SCSI hard disks. The LEDs on the backplane connect to the front panel LEDs to indicate HDD access, HDD failure, thermal failure, or fan failure. See section “1.6 LED information.”

Front side

The front side of the SCSI backplane faces the front panel when installed. This side includes four SCSI connectors for the hot swap drive trays.

 

 

 

 

 

 

 

 

HDD status LEDs

 

 

 

 

 

 

 

 

Disk drive 1

 

 

 

 

 

 

 

(Green/Red blinking

 

 

 

 

 

 

 

 

 

 

 

 

 

 

alternately when HDD is

SCSI ID = 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

rebuilding)

 

 

 

 

 

 

 

 

Disk drive 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCSI ID = 1

 

 

 

 

 

 

 

HDD activity LEDs

 

 

 

 

 

 

 

Disk drive 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCSI ID = 2

 

 

 

 

 

 

 

 

Disk drive 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCSI ID = 3

 

 

 

 

 

 

 

 

2-34

Chapter 2: Hardware setup