Digital Equipment RW504-ZA, Service Manual

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C
Connecting Multiple Optical Libraries
If the back panel of your host computer is configured with more than one
SCSI port, you can attach an Optical Library to each port. See Section C.1 for
directions.
You can also connect two Optical Library units to a single SCSI port on your host
computer by daisy-chaining the units together; that is, by connecting the first
Optical Library to the host computer, and then connecting the second Optical
Library to the first Optical Library. See Section C.2 for directions.
Note
Only two Optical Library units may be daisy-chained together and
connected to a single SCSI port.
If two Optical Library units are daisy-chained to one SCSI port on the host
computer, you must properly terminate the SCSI chain by installing the SCSI
terminator in the second SCSI port of the second Optical Library. See Section C.2
for directions. You must also set a new SCSI address for the autochanger
controller and the two optical disk drives of the second Optical Library unit. See
Section C.3 for directions.
C.1 Connecting Two Optical Library Units to Two SCSI
Ports
To connect two Optical Library units to separate SCSI ports on your host
computer, first check the back panel of your host computer to see that two SCSI
ports are available. SCSI ports are marked by the
PMAZ label and the SCSI icon.
If there are two SCSI ports available, follow the steps in Section 2.6.2 to uncrate
and prepare each Optical Library for connection to the host computer.
Change SCSI IDs for drive and controller address if necessary before connecting
to the host computer. Refer to Section C.3.
Connecting Multiple Optical Libraries C–1