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Tape Specifications<br />
Chapter 2. Magnetic Tape Formats<br />
IJPDS job files can be stored on disk or magnetic tape. This chapter<br />
describes the format required for magnetic tape. The disk format is<br />
described in Chapter 3.<br />
IJPDS job files on tape require 9-track magnetic tape using either no<br />
labels or IBM standard labels. Recording densities of 1600 or 6250 bits<br />
per inch (bpi) can be used.<br />
The tape uses variable-length record and variable-length block structures.<br />
Because the tape format does not exactly match any of the <strong>formats</strong><br />
defined by IBM, the format is considered as format U (Undefined) when<br />
processing the tape on an IBM mainframe.<br />
Two IBM-standard volume organizations are supported by KODAK<br />
VERSAMARK printing systems:<br />
Single file/single volume<br />
Single file/multiple volume.<br />
Only IBM standard labels are used in both volume organizations. User<br />
labels are ignored. Tapes for the single file/single volume organization<br />
can be generated with or without labels. Tapes for the single file/multiple<br />
volume organization must have labels.<br />
Note: If a tape is being prepared for use with the CS100 system controller, a<br />
single file/single volume tape with labels is required.<br />
Single File/Single Volume (without Labels)<br />
In a single file/single volume organization, a single file appears on a<br />
single tape volume. The following format is required for this volume<br />
organization when labels are not generated.<br />
- Tape Mark (optional)<br />
Job File<br />
- Tape Mark<br />
Reference Guide 2 - 1
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