T-BCK
Moves the tape back a specified number of records.
Command Class
TCL-I command.
Restrictions
Not valid with QIC drives.
Syntax
T-BCK {channel} {records}
Syntax Elements
channel Optional. The channel to which the required tape units have been attached using the ASSIGN command. If omitted, the tape units attached to the default channel are used.
records The number of records the tape is to be moved back. The maximum value for records is 31767. If records is not specified, or of fewer than records records are found, the tape moves to the position immediately before the previous EOF mark, or to the beginning of the tape if not found. Before reading the next record you must issue a T-FWD to position the tape after the EOF mark.
Comments
Before using T-BCK, you must attach the required tape units to the port.
Example
:
T-BCK B 2
The tape assigned to channel B moves back 2 records.