Interdata_v6/usr/doc/man/man1/rkdump.1

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including files from this version of Unix. 
.th RKDUMP I
.sh NAME
rkdump - convert PDP-11 filesystem image to dump format
.sh SYNOPSIS
rkdump [fsb] [outfile] file
.sh DESCRIPTION
.it rkdump
reads the named file, which is assumed to be an image of a PDP-11 UNIX
filesystem volume,
and produces an incremental dump tape
on /dev/mt0.
The dump tape can then be extracted to an Interdata UNIX filesystem
by restor(VIII).
It is useful mainly for examining the Bell Labs distribution tape.

Dump format and flags are the same as for the
.it dump
command.

.lp +4 4
f	Write the dump file to
.it outfile
instead of tape.
.s3
.lp +4 4
s	Specify tape size in feet
.s3
.lp +4 4
b	Specify tape size in blocks
.i0
.sh "SEE ALSO"
dump(VIII), restor(VIII)