afio and tape streaming

[WA7KGX]

Here's a command I use. The /tmp/DONE business assures that all the
files get on the tape even if the south end gets wasted.

cp /etc/termcap /tmp/DONE
date >/tmp/today
find /tmp/today . /tmp/DONE -print | /u/caf/bin/afio -ovzb 32k -s 62m /dev/rct0
tape status
tape rewind

The real buffering is in the tape driver.  SCO 3.2 makes the tape stream
most of the time, except for directories with zillions of tiny files.
Xenix FS is slower; try using a 1 meg buffer so the tape doesn't backup
so often.