Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!apple!sun-barr!decwrl!ucbvax!TUVALU.SW.MCC.COM!sandel
From: sandel@TUVALU.SW.MCC.COM (Charles Sandel)
Newsgroups: comp.sys.pyramid
Subject: Re:  what means char c in dump(1-ucb) ?
Message-ID: <8908031436.AA01798@tuvalu.sw.mcc.com>
Date: 3 Aug 89 14:36:13 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 16

The 'c' in the dump(8) command is used to specify
cartridge tape.
If 'c' is specified:
	1. if no density is specified, dump(8) uses 1000
	2. if no length is specified, dump(8) uses 1700 feet
	3. number of tapes estimated is based on the assumption
	that streaming stops at the end of each block

Since you can specify the length and density separately,
the 'c' option is mostly useful for its "knowledge"
of streaming cartridge tapes, and its use of that in
estimating the number of tapes required, and how much
tape has been used so that dump(8) can request a tape
change before end-of-tape.

Charles