V1/man/man4/tap0.4

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        11/3/71                                      /DEV/TAP0 ... TAP7 (Iv)


NAME              tap0 ... tap7

SYNOPSIS

DESCRIPTION       These files refer to DECtape drives 0 to 7. Since the
                  logical drive number can be manually set, all eight files
                  exist even though at present there are only two physical
                  drives.

                  The 256--word blocks on a standard DECtape are numbered 0
                  to 577. However, the system makes no assumption about this
                  number; a block can be read or written if it exists on the
                  tape and not otherwise. An error is returned if a
                  transaction is attempted for a block which does not exist.

                  Like the RK and RF special files, addressing on the tape
                  files is block--oriented. See the RF0 section.

FILES

SEE ALSO          /dev/rf0, /dev/rk0

DIAGNOSTICS

BUGS              see /dev/rf0

OWNER             ken, dmr