Dds Tape Drive And Cassette Descriptions; The Dds Drive - HP Visualize J5000 Owner's Manual

DDS Tape Drive and Cassette Descriptions

This section describes basic information needed for using your DDS tape
drive and data cassettes.

The DDS Drive

The DDS-3 tape drive has a 3.5-inch form factor and a narrow
single-ended SCSI interface. It incorporates data-compression capability
and is a high-capacity, high-transfer-rate device for data storage on tape.
With compression, a DDS-3 drive can store up to 24GB of data on a
125-meter tape.
Storage Capacities
The maximum storage capacities of different DDS tapes with and
without data compression are shown in the following tables;
Table 5-1
DDS3 drives will write DDS1 on 60m and 90m tapes, DDS2 on 120m
tapes and DDS3 format on 125m tapes. DDS3 format has the same track
density as DDS2 but triples the linear bit density. This yields the
non-intuitive native capacity (before compression) of 12Gbytes on a
125m tape.
Chapter 5
Using Your Digital Data Storage (DDS) Tape Drive
DDS Tape Drive and Cassette Descriptions
DDS3 Tape Drive Capacities Without Data
Compression
Tape Length DDS3 Capacity
60 meters 1.3 GB
90 meters 2.0 GB
120 meters 4.0 GB
125 meters 12.0GB
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