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  • 1
    Publication Date: 2011-08-19
    Description: Two optical disk 'jukebox' mass storage systems which provide access to any data in a store of 10 to the 13th bits (1250G bytes) within six seconds have been developed. The optical disk jukebox system is divided into two units, including a hardware/software controller and a disk drive. The controller provides flexibility and adaptability, through a ROM-based microcode-driven data processor and a ROM-based software-driven control processor. The cartridge storage module contains 125 optical disks housed in protective cartridges. Attention is given to a conceptual view of the disk drive unit, the NASA optical disk system, the NASA database management system configuration, the NASA optical disk system interface, and an open systems interconnect reference model.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: Computer (ISSN 0018-9162); 18; 36-45
    Format: text
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  • 2
    Publication Date: 2019-07-13
    Description: A Data Base Management System and an Archival Mass Memory System are being developed that will have a 10 to the 12th bit on-line and a 10 to the 13th off-line storage capacity. The integrated system will accept packetized data from the data staging area at 50 Mbps, create a comprehensive directory, provide for file management, record the data, perform error detection and correction, accept user requests, retrieve the requested data files and provide the data to multiple users at a combined rate of 50 Mbps. Stored and replicated data files will have a bit error rate of less than 10 to the -9th even after ten years of storage. The integrated system will be demonstrated to prove the technology late in 1981.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: AIAA PAPER 80-1908 , Sensor Systems for the 80''s Conference; Dec 02, 1980 - Dec 04, 1980; Colorado Springs, CO
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