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Technology Stocks : Disk Drive Sector Discussion Forum -- Ignore unavailable to you. Want to Upgrade?

To: Pierre-X who wrote (1994)	1/2/1998 1:54:00 PM
From: Gottfried	Read Replies (1) \| Respond to of 9256

PX, the IBM areal density charts used to be considered family jewels. IBM has opened up considerably in the last few years. We still need to know what the theoretical limits to areal density are. BTW, opinions on this vary. I have sent some e-mail to possible sources and will report if I get any data. Meanwhile, DD makers will stay in business for a few more years. The DiskTrend site keeps adding content, too. disktrend.com Regards Gottfried

To: Pierre-X who wrote (1994)	1/2/1998 1:59:00 PM
From: Mel Spivak	Read Replies (1) \| Respond to of 9256

Pierre, I see you are interested in videoconferencing. Look at Datapoint DPT who has a "collection" of patents in this area. They are now enforcing their patents against PCTL, INTC and a slew of others. Mel

To: Pierre-X who wrote (1994)	1/3/1998 9:40:00 PM
From: Gottfried	Read Replies (2) \| Respond to of 9256

PX, here's what a reliable source told me about the limits of areal density...(paraphrased) The theoretical limit is in the 40-100 Gb/in2 range. This is based on needing about 1000 particles per transition for adequate SNR. The 10 Gb/in2 demo was done with a total magnetic spacing of about 100 Angstroms. Some people are working on methods to get around this.[the 1000 particle limit]. One method is to use patterned media with one particle per bit. So it looks like we'll be OK for a few years. The above subject is over my head, so I am not able to discuss it. GM