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14 Connecting the Scalar 448
Installing SCSI Cables, Jumpers, and Terminators
Follow the steps on the following pages to connect your library to the SCSI bus. This involves installing SCSI
cables, terminators (s) and jumpers (daisy chain cables) onto the SCSI connectors at the rear of the library.
Note
• Make sure that the interface cable(s) you are planning on using
have the appropriate connectors on each end. If the host computer's
SCSI connector is different from that on the your library, you will
need to obtain an adapter or a different cable. Consult your dealer
or adic Customer Assistance if you need help.
• The interface cable(s) must be shielded – adic can supply you with
the correct type(s).
Determining Your SCSI Configuration
The Scalar Library can consist of up to five SCSI devices; four drives and the library. Listed below are the SCSI
configurations supported by the library:
l Connection to up to five SCSI interface channels (buses) are allowed.
l The SCSI buses can be either single-ended or differential. They should each match the peripheral they are
connected to.
l Each tape drive and the library robotics can be connected to separate SCSI buses, or up to four drives and the
robotics can be connected to the same SCSI bus.
l A device (drive or robotics) can be connected to more than one SCSI bus when integrated into a multi-
initiator environment.
l Termination can be active or passive. adic recommends using active termination on a single-ended bus.
l All termination must be external. Never use internal terminators to terminate the drives.
Note
SCSI bus TERM POWER is supplied by the robotics interface, not by
the drives. This can be modified. Please call adic Customer Assistance
if you need to change this.