[net.micro] CD Storage Technology idea

dat@hpcnoe.UUCP (dat) (10/19/84)

	Here's an idea that I have been playing with for an
optical storage device;

	Use a Digital Audio Disk system for Read-Only data (like
purchased software and distributable databases).  Think of the
advantages;

	A disk, about 3 1/2" across, could hold a minimum of
2.05 Megabytes of data (figured out by the fact that a disc can contain 
60 minutes of music, and must scan at least 36,000 a minute (I think))
(that completely ignores the fact that the signal has a BANDWIDTH too!

	Anyone have any ideas on this?

	The disks are about 10-15 dollars each now, and the drives are
down to under $500 each....

				-- Dave Taylor
					HP-CNO

herbie@watdcsu.UUCP (Herb Chong, Computing Services) (10/23/84)

Read this month's BYTE.  Sony has had prototypes ever since they
officially announced CD.

Herb...

I'm user-friendly -- I don't byte, I nybble....

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rik@ucla-cs.UUCP (10/23/84)

There's a paper in the October issue of BYTE:

"Optical Memory: Data Storage by Laser," by Edward S. Rothchild (pp. 215-224).

An interesting paper.  Talks about disks with hundreds of Megabytes becoming
available within a couple of years...

Rik Verstraete.
rik@UCLA-CS.ARPA
...!{cepu,ihnp4,trwspp,ucbvax}!ucla-cs!rik

alan@sdcrdcf.UUCP (Alan Algustyniak) (10/24/84)

Dave,

	Before you jump in with CDs, read the 22 Oct Electronics Week,
page 17.  The article is titled: Sony, Hitachi ready erasable optical
disks. It's subtitle is: Sony's 30-cm 1-gigabyte-per-side disk and
Hitachi's 12-cm 0.55-gigabyte disk bring commercial magneto-optical
gear into view.

	I'm not going to type-in all that's pertinent, but it does say:

	Later this month, Sony Corp.,...will deliver two drives...

	[Both cos.] imply that shipments are roughly two years in the
	future.