Operational Performance Of Optical Disk Systems

G. J. Ammon; J. A. Calabria

doi:10.1117/12.946443

12 April 1985 Operational Performance Of Optical Disk Systems

G. J. Ammon, J. A. Calabria

Proceedings Volume 0529, Optical Mass Data Storage I; (1985) https://doi.org/10.1117/12.946443
Event: 1985 Los Angeles Technical Symposium, 1985, Los Angeles, United States

Abstract

Two optical disk "jukebox" mass memory storage systems have been developed that provide access to any data in a store of 1013 bits (1250 Gbytes) within six seconds. These engineering models have been developed under a program sponsored by the Air Force and NASA ana have recently been delivered to testbed facilities -- one to NASA Marshall Space Flight Center and one to the AF Rome Air Development Center. Each system contains a library of 125 optical disks with mechanisms for retrieving any disk, and recording or playing digital data at 50 Mb/s. Disks in protective cartridges are moved from the store to a load station, which then mounts the disks onto a precision turntable. Still in the cartridge, they are spun up to speed and data is recorded or played back via focused laser beams. The major emphasis in both the NASA and Air Force jukebox optical disk systems has been reliability of operation. Enhancements of the mechanical, electrical, and software designs have been implemented to minimize the user downtime in an operating scenario. The NASA system will interface to a database management system using a fiber optics data bus, while the Air Force system will interface to a DEC VAX 11/750 minicomputer. Both systems will store digitized imagery and provide fast access to a huge store of such images.

Citation Download Citation

G. J. Ammon and J. A. Calabria "Operational Performance Of Optical Disk Systems", Proc. SPIE 0529, Optical Mass Data Storage I, (12 April 1985); https://doi.org/10.1117/12.946443

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available