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- Path: sparky!uunet!comp.vuw.ac.nz!waikato.ac.nz!meb
- From: meb@waikato.ac.nz
- Newsgroups: comp.arch.storage
- Subject: Re: VCR as a backup medium?
- Message-ID: <1993Jan27.112518.13456@waikato.ac.nz>
- Date: 27 Jan 93 11:25:18 +1300
- References: <1k1gofINNiek@access.usask.ca> <1993Jan26.045638.12425@netcom.com>
- Organization: University of Waikato, Hamilton, New Zealand
- Lines: 40
-
- In article <1993Jan26.045638.12425@netcom.com>, nagle@netcom.com (John Nagle) writes:
- > gps19@herald.usask.ca (Gregory P. Siemens) writes:
- >>Is it possible to use a VCR as a backup device. What hardware and
- >>software would be needed? I,m trying to come up with a cheap way of
- >>storing large amounts of data. If the hardware does not exist would it
- >>be difficult to construct(ie. what would be required). I would
- >>appreciate any(!!) enlightenment on this subject(reasons it will or
- >>won't work, etc.).
- >
- > It's been done, but I haven't seen an adapter for doing it since
- > about 1987. Heavy redundancy in the data is necessary (one system
- > recorded everything six times) because of the high noise level and
- > dropout problems with VCRs. VCRs are not well suited to stop-start
- > operation, so buffering is a problem.
- >
- > 8mm drives are often warmed-over camcorder decks, and 8mm backup
- > is a mature technology, although the drives still cost too much.
- > At least the tape is cheap. But VHS backup seems a dead technology.
- >
- > John Nagle
-
- I would be interested in any articals, information, or even adds documenting
- previous VCR interfaces. I have developed an interface that can store over
- 600 Megabytes of error corrected data on a standard 3 hour tape ($5-00).
- Only 26% of the data is redundant for error correction and resulting error
- rates are very low ( 10**-11 --> 10**-13). Anyway if previous work in this area
- has been done, i need references for my literature review.
-
- Thanks M. Baguley
-
- Marcus Baguley
- Computer Science Dept.
- Waikato University
- Private Bag
- Hamilton
- New Zealand
-
- EMAIL meb@waikato.ac.nz
-
-
-