Data reconstruction method and system wherein timing of data rec

Details Data reconstruction method and system wherein timing of data rec Data reconstruction method and system wherein timing of data rec

1998-09-29

2000-12-12

Nguyen, Hoa

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

714 47, 714 25, 714 2, G06F 1100

Patent

active

061611948

ABSTRACT:
A storage data reconstruction system including a plurality of storage units for storing therein divided data, the plural independent storage units forming a set; units for storing therein ECC data corresponding to the divided data; a spare storage unit for storing therein reconstructed data; an I/O-reconstruction control circuit; a timer; a data reconstructing table for a storage unit which has failed and a circuit for reconstructing faulty data. When a failure occurs in any of the storage units, the failure is detected by an error check, a state of the failure is discriminated, a preferred processing suitable for the state of the failure is selected from a processing of a normal access or read/write, and a data reconstruction processing, and the selected processing is carried out, or the frequency of the processing of the normal access or read/write and the data reconstruction processing, or the ratio of the amount of the data reconstruction processing within a unit time, is set. The time taken to reconstruct the faulty data does not exceed a fixed period of time.

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