IBM 4690 manual Conguring the Drive, Planning Your SCSI Conguration, Preparing for Installation

Step 1. Planning Your SCSI Con®guration

Plan what SCSI ID to give the tape drive connected to the SCSI bus adapter. Each device on the adapter bus must have a unique ID. You cannot assign a device 7 because most SCSI bus adapters use this as their ID. Typically, assign the higher SCSI ID numbers to those devices that are most often used or are faster than other devices in the SCSI chain. The tape drive is preset at the factory to SCSI ID 0. Refer to your SCSI bus adapter documentation for more information.

For most Store Controllers, you can press F1 during startup to view your Store Controller and SCSI bus adapter con®guration. Other Store Controllers can have different procedures to view the con®guration. Some SCSI adapters have utility programs that allow you to view the SCSI con®guration, or you might have to physically inspect the installed SCSI devices to see how the IDs are set. For more information, refer to the documentation that comes with your Store Controller or SCSI bus adapter.

Step 2. Preparing for Installation

1.Touch the static-protective bag containing the tape drive to an unpainted metal surface on the Store Controller for at least 2 seconds. Remove the drive from the static-protective bag, holding the drive by the edges, and place it in a convenient space next to your Store Controller.

2.Turn off the Store Controller and unplug the power cables from the power outlet for the Store Controller and all attached peripherals.

Step 3. Con®guring the Drive

The external SCSI model comes with the same defaults (termination disabled, terminator power disabled, and parity enabled) as the internal SCSI model. Refer to the instructions for the internal model, ªStep 3. Con®guring the Driveº, if you have to open the external enclosure and adjust these settings.

The power switch is on the front panel of the tape drive. The following interfaces are on the rear panel of the external drive:

vSCSI ID-selection push switch

vTwo SCSI interface connectors

vPower cord connector

Follow these instructions to install the tape drive:

1.The tape drive has two SCSI cable connectors. Connect the external tape drive to your Store Controller's SCSI bus adapter using a 50-pin ribbon SCSI cable (not provided) to one of the SCSI connectors on the back of the tape drive.

2.The end of a SCSI chain must be terminated to ensure the quality of the signal throughout the SCSI chain. Use an 8-bit active or passive terminator. An active terminator (IBM part number 32G3919 or equivalent) provides improved signal quality. Determine if you need to terminate the tape drive:

v When the drive is the last SCSI device in the chain (or the only drive) attach a terminator to the available SCSI connector on the back of the drive. Connect the second SCSI connector to the SCSI bus adapter cable.

vWhen the drive is within the chain do not terminate the tape drive. Connect the ®rst SCSI connector to the cable from the previous device in the chain. Connect the second SCSI connector to the next device in the chain.

10TR-4 Tape Drive User's Guide