ralphw@IUS3.IUS.CS.CMU.EDU (Ralph Hyre) (02/05/88)
I'm looking for information (rumors,even) about CD-WORM drives.
This would presumably be a CD-ROM transport with a higher-power laser for
burning pits into the disc for data storage. Similar technology
already exists for 8" and 12" optical media, why not for compact disc?
A SCSI interface and (Unix) Sun device driver would be nice, but not critical.
I can imagine paying up to $10,000 for such a device, and having one
or two per lab, with about 30 $500 CD-ROM drives attached to the
other workstations for reading the data.
I'd love to be able to put 500M of data on a single disc and send
it it a standard disk mailer with no special precautions needed.
It would be especially nice for personal archival storage.
Any information at all would be appreciated. Thanks.
--
- Ralph W. Hyre, Jr.
Internet: ralphw@ius2.cs.cmu.edu Phone:(412)268-{2847,3275} CMU-{BUGS,DARK}
Amateur Packet Radio: N3FGW@W2XO, or c/o W3VC, CMU Radio Club, Pittsburgh, PA
--
- Ralph W. Hyre, Jr.
Internet: ralphw@ius2.cs.cmu.edu Phone:(412)268-{2847,3275} CMU-{BUGS,DARK}
Amateur Packet Radio: N3FGW@W2XO, or c/o W3VC, CMU Radio Club, Pittsburgh, PAmark@cygnet.CYGNETSYSTEMS (Mark Quattrocchi) (02/06/88)
In article <806@PT.CS.CMU.EDU> ralphw@IUS3.IUS.CS.CMU.EDU (Ralph Hyre) writes: >I'm looking for information (rumors,even) about CD-WORM drives. >This would presumably be a CD-ROM transport with a higher-power laser for >burning pits into the disc for data storage. Similar technology >already exists for 8" and 12" optical media, why not for compact disc? > >A SCSI interface and (Unix) Sun device driver would be nice, but not critical. >I can imagine paying up to $10,000 for such a device, and having one >or two per lab, with about 30 $500 CD-ROM drives attached to the >other workstations for reading the data. > >I'd love to be able to put 500M of data on a single disc and send >it it a standard disk mailer with no special precautions needed. >It would be especially nice for personal archival storage. > Here's some info I have for 5.25" worm drives. All manufacters have slightly different formats for their drives and would more than likely not be compatable with CD-ROMs. Hitachi: Optical Disk Drive Specs: Model OD101-1 Storage capacity = 300 MB Data transfer rate (burst) = 690 KB/S Average access time (seeks) = 93ms Average access time (latency) = 17ms Disk speed = 1800 RPM (CAV) Dimension = 146x83x213 mm Formatter Controller Specs: Model OF101-1/2 Interface = ANSIX3T9.2 (SCSI) Data transfer rate = 1.5 MB/S Drives per OFC = Up to 4 Disk Cartridge Specs: Disk capacity = 300MB for OC101-1, 600MB for OC101-2 Track capacity = 16.4 KB/track Sector capacity = 1,024 B/Sector Recording density = 24,000 BPI Track density = 16,000 BPI Number of data tracks = 18,624 Number of track sectors = 16 Dimension = 135x11x153 mm Who to call: Computer Sales & Service Division No. 950 Elm Ave., Suite 100 San Bruno, Ca., 94066 (415)872-1902 Pioneer: Optical Disk Subsystem Specs: Interface = SCSI & Drive I/F Number of drives = 4 Buffer Capacity = 64 KB Data capacity/block = 1024 Bytes/block Data transfer speed = 1 MB/S Optical Disk Drive Specs: Loading system = Front loading Disk speed = 1800 RPM (CAV) Data transfer speed = 5.62 MB/S Average access time = 135 MS Interface = Drive I/F Optical Disk Specs: Data Capacity = 600 MB (double sided) Sectors/track = 17 Bytes/sector = 1024 Where to write: Pioneer Electronics Inc. 5000, Airport Plaza Dr. P.O. box 22711, Long Beach Ca., 90801-5711 Maxtor: Optical Disk Drive Specs: Model RXT-800S Capacity, formatted = 2048 byte sectors/per side 400 MB (CLV) Capacity unformatted per side = 780 MB SCSI bus transfer rate = 1 MB/S Average seek time = 108 MS Seek track to track = 5 MS Seek maximum = 444 MS Average latency = 60 Rotation speed = 334-668 RPM Recording density = 30,200 BPI Track density = 15,900 TPI Who to call: Maxtor Corporation 150 River Oaks Parkway San Jose, Ca., 95134 Telex 171074 Fax (408)433-0457 There are more than what I listed but I've got to get some work done. This should at least get you folks started in the wonderful world of optical disks.