Asus AP1720-E2 AP1720-E2 English version manual - Page 54
SCSI backplane connections
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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. Disk drive 1 SCSI ID = 0 Disk drive 2 SCSI ID = 1 Disk drive 3 SCSI ID = 2 Disk drive 4 SCSI ID = 3 HDD status LEDs (Green/Red blinking alternately when HDD is rebuilding) HDD activity LEDs 2-34 Chapter 2: Hardware setup