Quantum DLT 4000 Manual descarregar pdf (Página 28)

General Description and Specifications

1-4 Quantum DLT 4000 Tape Drive

1.3.2 Interface Type

DLT 4000 tape drives are available with narrow SCSI-2 fast single-ended or

differential high voltage interfaces.

1.3.3 Storage Capacity

The following table provides the ranges of capacity (native and compressed) for

the tape drive, depending on which DLTtape cartridge is used.

Table 1–2 DLT 4000 Storage Capacity

DLTtape Cartridge

(Length of Medium)

Native

Storage Capacity

Compressed

Storage Capacity

DLTtape IV

(extended 1780 foot tape)

20.0 GB User Data

40.0 GB User Data

(compressed 2:1)

DLTtape IIIxt

(extended 1780 foot tape)

15.0 GB User Data

30.0 GB User Data

(compressed 2:1)

DLTtape III

(standard 1167 foot tape)

10.0 GB User Data

20.0 GB User Data

(compressed 2:1)

Note: A compression factor of 2:1 can be attained, depending on the data type and

subject to the limitations of the SCSI bus design and the configuration of the

system in which the tape drive is installed.

1.3.4 Performance Data

The following table provides performance data for the DLT 4000 tape drive.

Table 1–3 DLT 4000 Performance Data

Feature Description

Transfer Rate, User Native

Transfer Rate, Raw Native

Transfer Rate, Compressed *

1.5 MB/second 2.5

MB/second More

than 3.0 MB/second maximum write, 10 MBburst

mode; More than 2.5 MB/second maximum read, 10

MBburst mode

Error Rates Recoverable READ Error Rate = 1 in 1x10

Recoverable WRITE Error Rate = 1 in 1x10

Uncorrected Error Rate = 1 in 1x10

bits read

Undetected Error Rate = 1 in 1x10

bits read

* = Depending on data type and SCSI bus limitations/system configuration.

Note that data is typical; times may be longer if error recovery time is needed.

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Quantum DLT 4000 Manual Página 28

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