Exabyte EXB-8205 Instrucciones de operaciones descargar pdf (Pagina 217)

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10.18 Tape Format Examples

ThissectionprovidesexamplesforusingtheCTStowrite,appendto,

and read tapes in the following formats:

8500c format (EXB-8505)

8500 format (EXB-8505)

8200c format

8200 format

As you review and use the examples in this section, keep the

following rules in mind:

The CTS allows only one format on any one tape.

If you are writing data, you must decide on the tape’s format at

LBOT. This is because the LBOT blocks define the format for the

tape. If you do not select a format, the CTS writes in the

power-on default format.

Note: To rewrite the tape in a different format, you must

overwrite the previously written LBOT pattern by issuing

a WRITE (0Ah) or WRITE FILEMARKS (10h) command at

LBOT.

If you are appending to a previously written tape at a location

other than LBOT, the CTS automatically writes in the format of

the data already on the tape.

If you are reading a previously written tape, the CTS

automatically determines the tape’s format for you. However, you

can determine the format for yourself by following these steps:

1. Load the data cartridge in the CTS.

2. Issue a MODE SENSE (1Ah) command.

3. Look at the Density Code in the Block Descriptor or the RTF

field in the Vendor Unique Parameters Page 1 (Page

Code=20h).

If you are using the EXB-8505 with a tape that has been formatted

with two partitions, you must read and write data in 8500c

format. If you attempt to change the format of the tape, you will

destroy the partition information.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

10-61

10 MODE SELECT (15h) andMODE SENSE (1Ah)

1 2 ... 212 213 214 215 216 217 218 219 220 221 222 ... 445 446

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Exabyte EXB-8205 Instrucciones de operaciones Pagina 217

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