Manual Reference Pages - COPYTAPE (5)
copytape - copytape intermediate data file format
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
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.
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.
A tape mark was encountered in the original tape.
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.
Some weird tapes may not use two consecutive tape marks
as logical end-of-tape.
|--> ||COPYTAPE (5) ||8 August 1986 |
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