Exabyte EXB-8205 Betriebsanleitung PDF herunterladen (Seite 290)

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22.1 About This Command

The SPACE command enables the CTS to perform forward or

backward searches. You can use this command to space directly to the

end of data or to space over a specified number of logical blocks,

filemarks, or setmarks (8500c format only).

Notes:

The CTS can space over both fixed- and variable-length logical

blocks; it determines the type of spacing to use according to the

type of block found on the tape.

If the disconnect option is enabled, the CTS can disconnect from

the initiator while the SPACE command is executing.

If you attempt to space backward immediately after writing data,

filemarks, or setmarks (8500c format only), the CTS will complete

the write operation before performing the space operation.

Completing the write operation includes writing any buffered

information to tape and writing an EOD mark (8500c, 8500, and

8200c format tapes only).

If an error occurs when the data in the buffer is being written, the

CTS returns Check Condition status and the space operation is

not performed. You can issue a REQUEST SENSE (03h) command

to determine the cause of the error.

If the CTS has the EEPROM image for directory support and the

CTS detects an EOD mark before the first filemark on tape, it

spaces over the EOD mark (at high speed) and up to 20 MBytes of

erase area until it finds the filemark it is seeking. For more

information about directory support, refer to Section 3.8. For a

sample application showing how to use the directory support

feature, refer to Appendix B.

22-2

EXB-8205 and EXB-8505

(Standard and XL)

510503

22 SPACE (11h)

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