jp@lanl-a.UUCP (10/12/84)
Does anyone have any info on optical hard disks or on using video disks to store digital information? The application is to replace 6250 bpi, 125 ips tape drives. Average data rate is .75 Mbytes/sec and a 2400 ft tape fills to 150 Mbytes in about 4 min. With 2 min to rewind a tape, two guys are kept busy just feeding tapes to two drives. This process results in writing about 3000 tapes during the course of the data acquisition activities. That is one helluva pile of tapes. If an optical disc system were available that could hold several tapes worth of data, it would be of immense interest. There is no requirement for random access. The files are created and read back sequentially. All that is needed is capacity, speed, and reliability. (Some error rate could be tolerated and some capacity could be sacrificed for redundancy or error correction.) If anyone has any information about the possibilities, immediate or future, for such a system, please let me know. Oh yes, the two drive tape system cost about $100K. Thanks, Jim Potter jp@lanl
djm@nmtvax.UUCP (12/31/85)
I've been noticing ads in Dr. Dobb's Journal from Optotech, Inc. for an
optical disk drive. To quote the ad :
Optical Disk Drive 5984
* 200 megabytes on a removable cartridge
* Fast access read and _write_
* For PCs and minis
* Extensive interface software
* Available Now
Does anyone know anything about this puppy? Specifically, is it actually
using CD-type medium, does it really work, how fast is fast, etc.?
Thanx.
Dieter Muller
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(telepath_net) Hey you! Yeah, you with the fuzzy face!
Choose a disclaimer, any disclaimer. Now hold it so I can't see it....hsu@eneevax.UUCP (Dave Hsu) (01/02/86)
In article <922@nmtvax.UUCP> djm@nmtvax.UUCP (The Demented Teddy Bear) writes: >I've been noticing ads in Dr. Dobb's Journal from Optotech, Inc. for an >optical disk drive. To quote the ad : > > Optical Disk Drive 5984 > * 200 megabytes on a removable cartridge > * Fast access read and _write_ > * For PCs and minis > * Extensive interface software > * Available Now > >Does anyone know anything about this puppy? Specifically, is it actually >using CD-type medium, does it really work, how fast is fast, etc.? > Dieter Muller In the same light, does anybody have any info on the Shugart SA500(0?) From what I understand, it uses $20 CD-sized blanks and sells for around 5k or so. NASA/Goddard is rumored to have received one two or three months ago. thanks in advance, -dave -- David Hsu Communication & Signal Processing Lab, EE Department <disclaimer> University of Maryland, College Park, MD 20742 hsu@eneevax.umd.edu {seismo,allegra}!umcp-cs!eneevax!hsu CF522@UMDD.BITNET And then there were none.