Quantum DLT 8000 Manual descarregar pdf (Página 89)

Configuring, Installing, and Operating the Tape Drive

Quantum DLT 8000 Tape System 2-35

2.5.3 Selecting Density

CAUTION

If the tape is not positioned at End of Data (EOD), a WRITE to the tape will deny

access to previously recorded data beyond the current tape position. To prevent

this, position the tape to EOD, then perform the WRITE. This condition is termed

an “appended WRITE.”

NOTES

1. Default capacity of a DLTtape

III cartridge is 10.0 GB, native or 20.0 GB

(compression ON).

2. Default capacity of a DLTtape IIIXT cartridge is 15.0 GB, native (compression

OFF), or 30.0 GB (compression ON).

3. Default capacity of a DLTtape IV cartridge is 40.0 GB, native (compression

OFF), or 80 GB, compressed. A capacity of 35.0 GB native (compression OFF,

or 70 GB, compressed OR 20.0 GB native (compression OFF), or 40 GB,

compressed, is user-selectable.

Various storage capacities can be selected by specifying the density of the data to be

recorded on the tape media.

Using the DLTtape IV cartridge:

1. On all READ and all WRITE APPEND operations, the data density that already

exists on the tape cartridge remains the density.

2. When writing from BOT, tape density may be changed by:

• Using the Density Select Button on the front panel of the tape system. Using

the front panel’s Density Select Button always overrides density selection via

the host.

• Using the operating system to issue a density designation. In this case, the

yellow Density Override indicator on the tape system’s front panel is

extinguished, indicating an automatic or host density selection.

Native default capacity for the DLTtape IV is 40.0 GB (80.0 GB, compressed), assuming

the Density Select Button was not used or that host selection of density via the

operating system was not invoked.

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Quantum DLT 8000 Manual Página 89