NEC 120Lg manual Disk Array Configuration of Built-in Hard Disks, Internal Cabling Diagrams D-3

Disk Array Configuration of Built-in

Hard Disks

For the disk array configuration of hard disks installed in the built-in 3.5-inch device bays, the disk array controller board of an option is installed in the server and the SCSI cable connected to the Ultra320 connector is disconnected from the connector and then connected to the disk array controller board instead. The server can be equipped with up to four disk array controller boards.

Some disk array controllers contain more than one channel. For such a disk array controller, you may connect one of the two channels to the built-in SCSI backboard joined with the hard disk in a 3.5-in device bay and the remaining channel to a additional disk unit. A disk array controller of another type has two connectors in a channel, or external and built-in connectors. Note that a single channel may not be used for both external and built-in devices.

With a disk array controller having more than one channel, you may connect the other channel with additional disk unit.

System board
Disk array controller board	Floppy disk
PCI #1
PCI #2
PCI #3
PCI #4
PCI #5	IDE
PCI #6	IDE
	SCSI
DAC
LED

Option

CD-ROM

Option

Floppy disk

drive

ID5

ID4

ID3

ID2

ID1

ID0

5.25-inch device bay

Disk array

SCSI cable	IDE cable
DAC LED cable	Floppy disk drive cable

Internal Cabling Diagrams D-3