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- Newsgroups: k12.ed.science
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!wvhorn
- From: wvhorn@magnus.acs.ohio-state.edu (William VanHorne)
- Subject: Re: Computer desiphering
- Message-ID: <1992Dec22.144854.14244@magnus.acs.ohio-state.edu>
- Sender: news@magnus.acs.ohio-state.edu
- Nntp-Posting-Host: bottom.magnus.acs.ohio-state.edu
- Organization: The Ohio State University
- References: <32187.2B36E797@puddle.fidonet.org>
- Date: Tue, 22 Dec 1992 14:48:54 GMT
- Lines: 46
-
- In article <32187.2B36E797@puddle.fidonet.org> Mike.Peterson@p0.f14.n346.z1.fidonet.org (Mike Peterson) writes:
- > I was saving a message on a 3.5" disk and wondered how a
- >floppy disk is made. Is it like a compact disk or more like a
- >record. Is the information retrieved with a laser or a needle? How
- >does the computer decipher all of the little holes or dots? I was
- >also surprised how much information fits onto a High Density disk.
-
- Mike,
-
- A floppy disk is just like a cassette tape that has been flattened. A magnetic
- read/write head accesses the info, just like the play and record heads on a
- cassette tape deck or VCR. In fact, the early PCs (including the original
- IBM PC) allowed cassette players to be used as data storage.
-
- >And then I just read an article that said that scientists have
- >invented a 3.5" disk that holds 20 megabytes! Is this true?!?
-
- Yes! They are called "floptical" disks, at least they are called "flopticals"
- by the Iomega Corp. who manufactures them. The trick to "floptical" disks
- is using a laser beam to permanently mark the tracks on the disk, and then
- using a laser to guide the read/write head in the disk drive. This allows
- much more precise tracking and hence a higher density of information.
-
- > How long do you think that it will take until the computers
- >that we have now shall be out of date? I am afraid to buy a new
- >computer in the fact that it will be updated. What happens when
- >virtual reality comes out. Will all of our computers be
- >worthless?? I am very concerned that the computer market is growing
- >very fast and that computers that we have may be useless in a
- >couple years!
- >
-
- If you are using the most advanced state-of-the-art PC today, it will be
- "obsolete" within 18-24 months. However, obsolete does *not* mean "useless"!
- I use a 1984-vintage Zenith PC clone for word processing and modem
- communicatons, for example. The ol' bomb won't run Windows, chokes on modern
- spreadsheets (like Quattro), and doesn't have enough disk space to even come
- close to holding a compiler like Borland C++. It is still very useful, and
- frees my 40-MHz 386 machine from intrinsically slow tasks like word processing.
-
- Don't worry. When you buy a computer, buy one that will perform the tasks
- you need it to perform. As it is bypassed by technological advances, it will
- still perform for you.
-
- ---Bill VanHorne
-
-