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From: rehmi@umcp-cs.UUCP
Newsgroups: net.micro,net.rumor
Subject: Re: New Half gegabyte ROM...CD vs LASER
Message-ID: <6839@umcp-cs.UUCP>
Date: Tue, 1-May-84 10:02:25 EDT
Article-I.D.: umcp-cs.6839
Posted: Tue May  1 10:02:25 1984
Date-Received: Thu, 3-May-84 19:43:25 EDT
References: <266@nmtvax.UUCP>, <725@ihuxx.UUCP> <271@nmtvax.UUCP> <1050@qubix.UUCP> <6834@umcp-cs.UUCP>
Organization: Univ. of Maryland, Computer Science Dept.
Lines: 31


From: judd@umcp-cs.UUCP (Judd Rogers)

this may not be as usefull as it sounds.  since the idea is to
mass-produce data and files on these 1/2 gigabyte CD's the potential
for an error to cause lots of damage is high.  eg 300 engineers
get stress analysis w/ some vital parameter wrong  eg g=9.6m/s^2.

/* ------------- */

I kind of doubt that they'd stamp out these things and sell them without
verifying them first. There would also doubtless be error correction of
some form. In fact, even on the audio discs they have some elaborate
error detection/recovery cruft.

Any other media that programs get distributed on is susceptible to errors.
How many times have you received a bogus distribution tape, for example?
Not to mention that it would seem harder to corrupt data burned solidly
into a piece of plastic (or whatever it is) than it would to corrupt data
floating as magnetic domains on a film of mylar. And don't forget that there
is another eighth-inch layer of plastic over the coded piece of plastic.
Pretty tuff.

Then again, there are still those who want to go back to the "reliability"
of stepper relays. *Sigh*...

					-rehmi
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