File backup system

Details File backup system File backup system

1989-02-27

1991-10-22

Shaw, Gareth D.

Boots, shoes, and leggings

3649185, 36494391, 364945, 3649442, 364962, 3649621, 3649665, 364405, 371 101, 902 22, G06F 1521, G06F 1216

Patent

active

050601857

ABSTRACT:
A file backup system for POS data includes a master terminal and a backup terminal along with a master file and a backup file, all of which are coupled to a plurality of satellite terminals. A file controller is provided for each of the files. When one of the files is down, the master file is capable of copying the contents of the down file while simultaneously responding to a request from any terminal and controlling the transfer of data without stopping the operation of the system.

REFERENCES:
patent: 3866182 (1975-02-01), Yamada et al.
patent: 4169288 (1979-09-01), Fairman et al.
patent: 4319326 (1982-03-01), Uchida
patent: 4590551 (1986-05-01), Mathews
patent: 4683536 (1987-07-01), Yamamoto
patent: 4733392 (1988-03-01), Yamaguchi
patent: 4771382 (1988-09-01), Shiono et al.
patent: 4859838 (1989-08-01), Okiharu
Patent Abstracts of Japan, vol. 8, No. 183 (P-296)(1620), Aug. 23, 1984, and JP, A, 5975349 (Hitachi Seisakusho K.K.) Apr. 28, 1984.

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