home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.mac.apps
- Path: sparky!uunet!europa.asd.contel.com!darwin.sura.net!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!ira.uka.de!smurf.sub.org!nadia!skeeve
- From: skeeve@nadia.stgt.sub.org (Michael Koerner)
- Subject: Re: 'Tape' Backup
- References: <1992Nov12.203324.593507@sue.cc.uregina.ca>
- Date: Sun, 15 Nov 1992 13:52:09 GMT
- Organization: Stuttgart Net Systems, FRG
- Message-ID: <1992Nov15.135209.26562@nadia.stgt.sub.org>
- Lines: 24
-
- macnei@hercules.cs.uregina.ca (Mike MacNeill) writes:
-
- >Damn I hate vi.
-
- >A couple of nights ago I had a strange dream in which I was backing up my
- >harddrive using an LCII and a tape-recorder hooked up to the sound input
- >and output ports. This is quite strange as I've had a MacII since 1987 and
- >have no wish to downgrade yet. Today, though, while trying to stay awake
- >in class, I started thinking about and doing some preliminary calculations.
-
- >1) 10mb = 10240K = 10,485,760 bytes = 83,886,080 bits
-
- >2) 45 minutes = 2700 seconds
-
- >3) Therefore, you would have to be able to store and be able to read back
- > 31,000 bits per second.
- To get this idea to work you must slow down to at least 10000 bps, because
- you have to add redundant data by the factor of 1.5 and your (high quality !)
- tape deck will not allow you to record more than 15000 bps (if ever!). So
- forget it
-
- Michael Koerner
- E-Mail: skeeve@nadia.stgt.sub.org
-
-