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Each device on a SCSI bus must have a SCSI identifier (ID) that identifies it to the
server. When you install the Ultrium 2 Tape Drive, you can specify its SCSI ID in
one of three ways:
v By attaching jumpers to the SCSI ID connector
v By using your enclosure’s SCSI ID switch
v If you are installing the drive into a tape library, by setting the SCSI ID through
the LDI or RS-422 interface
For more information, see “Setting the SCSI ID (SCSI Drive Only)” on page 17.
Installing, Removing, or Resetting a Drive on an Active SCSI Bus
You can attach an Ultrium 2 Tape Drive to an active SCSI bus. However, the
preferred and safest method of adding, removing, or resetting a drive is to power-off
the system.
When adding, removing, or resetting a drive on an active SCSI bus, perform the
following steps:
1. Quiesce the drive. The drive to be added, removed, or reset must not be
involved in any bus activity.
2. Disconnect power to the drive.
3. Connect or disconnect the SCSI bus cables to or from the drive’s SCSI
connector. Ensure that the SCSI bus remains intact from the server (initiator) to
the terminator throughout the connection or disconnection process.
Note: Changing or moving the terminator disrupts the continuity of the SCSI
bus and interrupts any process on the bus.
Chapter 1. Introduction 5