Positioning tapes

When editing tapes, it is possible to position the input tape before transferring data blocks. The CHANGE-INPUT-TAPEPOSITION statement can be used to position (either forwards or backwards):

• a specific number of blocks

• a specific number of tape marks

• to beginning-of-tape

• to end-of-tape

• to beyond end-of-tape (system administrator only)

• to the next double tape mark. Positioning is implemented immediately.