Quantum DAT 160 User's Guide download pdf (Page 41)

Chapter 3 Installing External Tape Drives

Connecting the SCSI Tape Drive

Quantum DAT 160 User’s Guide 27

Why the SCSI Bus Type

Important 3

The SCSI bus type determines the speed at which data can be transferred

between devices on the bus and the maximum length of cable that can be

used. The drives support a burst transfer rate of 160 MB/sec. To benefit

from this level of performance, it is important to ensure that the drives

are connected to a SCSI bus of a similar or higher specification. This

means that you need:

• An Ultra160 or Ultra320 SCSI bus. If you attach the drive to a lower

specification SCSI bus, it will still work but data will not be

transferred as quickly.

• LVD-rated SCSI cabling and terminators. The LVD interface enables

the data to be transferred at the drive's maximum rate.

Table 4 Supported SCSI Bus

Types

Reviewing the Drive

Default Settings 3

Your external tape drive comes with various default settings. You may

need to change these settings to suit your requirements. Review the

default settings in table 5

to determine whether they suit your

requirements or need to be changed.

Note: The drives are not compatible with high voltage differential

(HVD) SCSI devices.

SCSI Bus Type Supported

Ultra160 LVD, Ultra320

LVD

Yes. These are recommended

configurations.

Ultra2 LVD, Ultra Wide

LVD

Yes. These are supported, but

performance may be impaired.

Ultra wide, single-ended Yes. But this is not a recommended

configuration as it will restrict

performance.

Ultra narrow, single-ended Yes. But this is not recommended as it will

severely restrict performance and you will

need a suitable cable or adapter.

High Voltage Differential No. The drive will not work and you may

damage the drive or controller

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