Exabyte 8505XL - Manual (Page 14)

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Chapter 1: Installation
Before setting the tape drive’s SCSI ID, determine the SCSI IDs of all the
other SCSI devices currently attached to your bus (for example, a hard drive
or a CD-ROM reader).
Caution: SCSI ID 0 is reserved for the system controller and cannot be used.
The tape drive is shipped with the SCSI ID set to 6. If you are installing the tape
drive on an existing SCSI bus and another device (for example, a hard drive)
is already assigned to that ID, you must change the tape drive’s ID.
Follow these steps to change the SCSI ID of the 8505XL:
Note: The 8505XL SCSI jumpers are located in the back of the drive and are
covered by the drive sled hardware. To change the SCSI ID, you must
remove the 8505XL from the drive sled.