🚀 go-pugleaf

Submitted-by: hcbarth@afterlife.uucp (Bart Bartholomew)

	I once used a system that had disk sectors as the
basic storage unit.  Obviously not Unix.  At the end of each
record (sector) on the backup medium, there were a few extra
pieces of information:
	64-bit checksum (Not mod2 add, a rather more complex
			calculation.)
	current filename
	current recordnumber of filename
	number of records in filename
	Administrative trivia, like owner, etc.
The unusual point here is the explicit support for multi-volume
archives.  In particular, you could split a file over two tapes,
*restore from tape 2 first* (it was sometimes convenient), and
then from tape1.  The numrec of numberofrecs information came
in handy many many times.  In fact, sometimes we would have
two drives going at the same tim during restore, and properly
reconstruct the files.  On a full restore, we had eight drives
going simultaneously at full speed.  A nice part of the system
was that we could reconstruct the directories starting at any
tape in the set.  If lables got lost, no big deal.
	Clearly, support for multiple volumes is needed.
	Bart
-- 
"It's not the thing you fling, the fling's the thing." - Chris Stevens
 If there's one thing I just can't stand, it's intolerance.
*No One* is responsible for my views, I'm a committee. Please do not
infer that which I do not imply.  hcbarth@afterlife.ncsc.mil


Volume-Number: Volume 28, Number 74