Quantum Audio drive DDS-4 - Manual (Page 29)

Installing internal tape drives Connecting a SCSI Cable
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Connecting a SCSI Cable
The internal tape drives can be used with two SCSI interfaces:
• Wide SCSI — either Low Voltage Differential (LVD) or Single-ended (16-bit Wide mode),
• Narrow SCSI — either Low Voltage Differential (LVD) or Single-ended (8-bit Wide mode).
The tape drive automatically detects whether the SCSI bus is LVD or single ended. Be sure the SCSI
bus is terminated properly.
NOTE: We strongly recommend that you attach the tape drive to SCSI controllers that
support the SCSI Ultra2 LVD interface only. Attaching the tape drive to a non-LVD SCSI
controller or an 8-bit Narrow SCSI controller will degrade the performance of your tape
drive and backup operations. Performance will also be degraded if you attach non-LVD
SCSI devices on the same bus cable as your LVD connection. Do not connect the tape drive
to a disk RAID controller (disk RAID controllers are not supported). If you install an adapter,
we recommend you purchase a SCSI LVD controller kit that includes the SCSI cable and
terminator.
Connecting to a Wide SCSI Connector
If your computer has a 68-pin wide SCSI connector:
1. Attach the interface cable from the SCSI host adapter to the 68-pin SCSI interface connector
on the back of the internal tape drive (see Figure 8 on page 29).
FIGURE 8. SCSI Interface Connector on the Internal Tape Drive
Connecting to a Narrow SCSI Connector
The internal tape drives have an Ultra Wide SCSI interface. Obtaining a 50-to-68 pin adapter lets
you connect the 68 pins on the internal tape drive to the 50 pins on the computer’s narrow SCSI bus.
1. Connect the adapter to your computer’s 50-pin SCSI connector.
2. Connect the SCSI cable with the adapter to the internal tape drive’s 68-pin SCSI connector.
NOTE: Be sure the upper 8 data bytes of the 68-pin cable are properly terminated.