Patent ID: 6209001
Filing Date: 2001-03-27
Classification: G06F,Y10S

Abstract:
A back-up system comprising:a main storage unit;a buffer storage unit;an auxiliary storage unit;a back-up storage unit;a control unit for controlling said main storage unit and said auxiliary storage unit in a normal operation such that a first data is written in said main storage unit and said auxiliary storage unit, for controlling said auxiliary storage unit and said back-up storage unit in a back-up operation such that said first data stored in said auxiliary storage unit is transferred to said back-up storage unit, and controlling said main storage unit, said buffer storage unit and said auxiliary storage unit during said back-up operation such that a second data is stored in said main storage unit and said buffer storage unit but is not stored in said auxiliary storage unit, and for controlling said buffer storage unit and said auxiliary storage unit after said back-up operation such that said second data is transferred from said buffer storage to said auxiliary storage unit.