Boots – shoes – and leggings
Patent
1989-06-30
1990-09-25
Lee, Thomas C.
Boots, shoes, and leggings
3642481, 3642549, 3642682, 3642693, 3642734, 364285, 371 12, 371 66, 365228, G06F 1500, G06F 1130, G06F 1216
Patent
active
049597744
ABSTRACT:
A highly reliable shadow memory system is able to survive multiple fast sequence power failures and includes a volatile main memory and a shadow memory subsystem which continually monitors write accesses to the main memory. The shadow memory subsystem includes a disk drive or shadow memory storing a copy of the data in main memory. As the main memory contents are altered, the shadow memory is continually updated to reflect the changes while main utility power is available. In the event of a main utility power failure, backup power is required to store main memory data in the shadow memory for only a few storage locations for which the updating of the shadow memory may lag main memory data changes. Consequently, only a small portion of available battery backup power is required to preserve all main memory data and the system can withstand multiple rapid succession power failures without loss of data.
REFERENCES:
patent: 3916390 (1975-10-01), Chang et al.
patent: 4044337 (1977-08-01), Hicks et al.
patent: 4093999 (1978-06-01), Fuller et al.
patent: 4291388 (1981-09-01), Ecker, Jr. et al.
patent: 4413327 (1983-11-01), Sabo et al.
patent: 4442501 (1984-04-01), Eckert, Jr. et al.
patent: 4458307 (1984-07-01), McAnlis et al.
patent: 4466098 (1984-08-01), Southard
patent: 4503494 (1985-03-01), Hamilton et al.
patent: 4525800 (1985-06-01), Hamerla
patent: 4564922 (1986-01-01), Muller
patent: 4591976 (1986-05-01), Webber et al.
patent: 4654819 (1987-03-01), Stiffler et al.
Digital Design, 10/83, pp. 92-97, "Solid State Disks Optimize Throughput".
Hippert et al, "Saving Random Access Memory in the Event of a Power Failure", IBM TDB, vol. 17, No. 5, Oct. 1974, pp. 1449-1450.
Polivka, "Streaming-Tape Software Uses Bit-Map Copying", Mini-Micro Systems, Apr. 1984, pp. 203-208.
Ampex Corporation
Lee Thomas C.
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