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- Newsgroups: comp.sys.apple2
- Path: sparky!uunet!elroy.jpl.nasa.gov!nntp-server.caltech.edu!toddpw
- From: toddpw@cco.caltech.edu (Todd P. Whitesel)
- Subject: Re: Ramfast and Tape Backup units..
- Message-ID: <1992Aug27.040457.15709@cco.caltech.edu>
- Sender: news@cco.caltech.edu
- Nntp-Posting-Host: punisher
- Organization: California Institute of Technology, Pasadena
- References: <RWIFALL.92Aug24165136@dante.nmsu.edu> <1992Aug25.081136.11854@cco.caltech.edu> <RWIFALL.92Aug25104447@dante.nmsu.edu> <1992Aug26.040841.24422@cco.caltech.edu> <RWIFALL.92Aug26175840@dante.nmsu.edu>
- Distribution: comp.sys.apple2
- Date: Thu, 27 Aug 1992 04:04:57 GMT
- Lines: 43
-
- rwifall@nmsu.edu (Richard J Wifall) writes:
-
- > I don't care about any of that.. I don't care what programs do and
- >do not backup to block devices... What I do care about, and want to
- >know is HOW to make my tape drive come up as un-write protected under
-
- It doesn't matter if you care about it or not. The fact is that you are
- asking for a solution that is impossible, and I was trying to give you an
- idea of what the REAL problem is. I am willing to bet MONEY that you CANNOT
- do what you want unless CVT changes something about the way the RF drivers
- work.
-
- Here's why: Tape drives are NOT RANDOM-ACCESS DEVICES. They can do only three
- things -- rewind, scan forward to block x and read it, and write a block at
- the END of the tape. Trying to write a block in the middle of the tape is
- very dangerous and you would toast the block immediately following it a good
- portion of the time. This is because tape drives are not too precise; it comes
- with the ability to use media that is much cheaper per megabyte. The only
- reason you can put a tape on the desktop at all is because CVT thought it'd be
- cool to let you mount the filesystem and read specific files without restoring
- the whole volume, slow as it is.
-
- >GS/OS.. (ie Finder, GNO, or any other program that uses GS/OS) I can
- >handle the backing up myself.. I could write a program to do it if I
- >had too... I just want to know how to make the tape drive not come up
- >as write protected.. That's it..
-
- Like I said, that is not the real problem. Even if you _could_ make it come
- up not write protected, you would quickly regret it. Unless CVT has put some
- special logic in their driver SPECIFICALLY FOR THIS USE (not likely) you have
- three options:
- 1. call the ramfast directly and use SCSI calls to manipulate the tape
- drive as a SCSI tape drive.
- 2. get somebody (CVT probably) to write a SCSITAPE type driver for the
- Ramfast and use the tape drive as a GS/OS character device.
- 3. return your tape drive and buy a removable HD (syquest/floptical).
-
- Todd Whitesel
- toddpw @ cco.caltech.edu
-
- P.S. Current word on the flopticals is that Drew said on Genie "We've gotten
- some requests for those and we're considering getting one for testing BUT NO
- PROMISES AT THIS TIME." as of tuesday night.
-