DATEIWIEDERHERSTELLUNGSSYSTEM UND VERFAHREN FÜR VERKAUFSSTELLEN.

摘要

A file recovery system for POS data includes a master terminal (24) and a backup terminal (26) along with a master file device (12) and a backup file device (18), all of which are coupled to a plurality of satellite terminal (30). The master file device (12) includes a master file (16) and associated file controller (14) and the backup file device (18) includes a backup file (22) and associated file controller (20). When one of the file devices (12, 18) has been repaired after a failure, the contents of the other file device (12, 18), which has been operating as the main file device, copies the contents of its data file into the data file of the repaired file device (12, 18), while continuing to operate to respond to data requests from the terminals (24, 26, 30).