Installing Internal Drives
Example 1: A non-disk-array model contains drives in bay
B, and banks C, D, and E.
A 16-bit SCSI cable connects the drive in Bay B to the
CD-ROM drive, then to the output connector on the
backplane in bank C. An internal SCSI cable connects the
input connector on the backplane in bank C to the internal
16-bit SCSI-2 connector on one SCSI-2 adapter. Internal
SCSI cables connect the SCSI-2 input connectors on the
backplanes in bank D and bank E to the other SCSI-2
adapters. A DASD status cable (also known as a system
status cable) connects to the backplanes in banks C, D, and
E.
Example 2: A disk-array model uses separate SCSI cables
to connect from the ServeRAID adapter in a PCI expansion
slot to banks C, D, and E. The DASD status cable (also
known as a system status cable) connects the adapter to the
backplane in bank C, and continues to the DASD status
connector on the backplanes in bank D and bank E.
In this example, you cannot connect external devices to the
ServeRAID adapter. Instead, you must install a second
ServeRAID adapter to support external devices.
Example 3: A cable connects the CD-ROM drive and a
tape drive installed in bay B of a disk-array model to the
output connector on the bank C backplane. A cable
connects the input connector on the bank C backplane to
Channel 3 on the ServeRAID adapter. A daisy-chain cable
connects the input connector on the bank D backplane to the
output connector on the bank E backplane; the backplane in
bank E is set to HI. A SCSI cable connects the input
connector on the bank E backplane to Channel 2 on the
ServeRAID adapter. Banks D and E contain three half-high
drives each. The DASD status cable connects the adapter to
the backplane in bank C, and continues to the DASD status
connector on the backplanes in bank D and bank E.
In this example, you can connect external devices to the
external connector on the ServeRAID adapter.
236 PC Server 520 User's Handbook for PCI/EISA
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