WARNING

The t-bck command is only reliable on floppy disks and 1/2-inch tapes.

SCTs cannot go backwards, so the t-bck command may fail. The last block read may still be in the buffer, which can be useful for reading labels. SCTs usually must be rewound with the t-rew command and moved forward with the t-fwd or t-space command to the desired tape file.

t-bck {number}

number

Indicates the number of blocks to backspace. If the number is not specified, the tape backspaces to a position immediately preceding the previous EOF mark, or to load point. Before reading the next file, a t-fwd command must be issued to position the tape after the EOF mark.