Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 93)

Important

When you reformat a dual-partition tape to create a

single-partition tape, all of the information defining the

original two partitions is erased. However, the data on the

tape is not erased. For this reason, if you are concerned about

data remaining on a tape, do not use reformatting as a way to

erase data. You must explicitly perform an erase operation to

erase the data.

Unloading a Partitioned Tape

The UNLOAD command works exactly as it would for a

single-partition tape. You can issue the UNLOAD command from

either the first or the second partition. The EXB-8505 rewinds the tape

to the physical beginning of tape (PBOT), unloads the tape from the

tape path, and ejects the cartridge.

3.8 Using Directory Support

The directory support feature is an option that requires a special

EEPROM image (see the “Allow position past EOD” option on

page A-21). This EEPROM option provides a means of creating a

directory at the beginning of a tape written in a format that does not

support partitions (8500 or 8200c format). It also enables a CTS to

work with tapes that were created using the directory support feature

or with drivers that have implemented directory support.

When the CTS includes the EEPROM image for directory support, it

allows a tape written in 8500c, 8500, or 8200c format to have two

end-of-data (EOD) marks: one at the end of the directory and the

other at the actual end of data on the tape. As long as the first EOD

mark is located before the first filemark, the CTS can space over it.

Refer to Appendix B for complete instructions for using the directory

support feature.

Note: For the EXB-8505 writing in 8500c format, partitions are the

preferred method of maintaining a directory at the beginning

of a tape. See Section 3.7 for complete instructions for creating

and using partitioned tapes.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

3-31

3 Implementing CTS Operations

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Exabyte EXB-8205 Instruções de Operação Página 93