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| COPYTAPE(5) | FreeBSD File Formats Manual | COPYTAPE(5) |
NAME
copytape - copytape intermediate data file formatDESCRIPTION
copytape duplicates magtapes on single-tape systems by making an intermediate copy of the tape in a disk file. This disk file has a special format that preserves the block boundaries and tape marks of the original physical tape.Each block is preceded by a header identifying what sort of block it is. In the case of data blocks, the length of the data is also given. Each header is on a separate text line, followed by a newline character.
- CPTP:BLK nnnnnn
- data\n
A data block is identified by the keyword BLK. The length of the block is given in a six-character numeric field. The field is zero-padded on the left if less than six characters are needed. The header is followed by a newline character. The original data follows. The data may have any characters in it, since copytape uses a read(2) to extract it. The data is followed by a newline, to make the file easy to view with an editor.
- CPTP:MRK
- A tape mark was encountered in the original tape.
- CPTP:EOT
- When two consecutive tape marks are encountered, copytape treats the second as a logical end-of-tape. On output, both MRK and EOT generate a physical tape mark. copytape stops processing after copying an EOT.
SEE ALSO
mtio(4)BUGS
Some weird tapes may not use two consecutive tape marks as logical end-of-tape.| 8 August 1986 |
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