Remote copy secondary data copy validation-audit function

Details Remote copy secondary data copy validation-audit function Remote copy secondary data copy validation-audit function

1994-10-03

1997-01-07

Beausoliel, Jr., Robert W.

39518505, 395489, G06F 1100

Patent

active

055926185

ABSTRACT:
A data copy validation technique compares primary data to a copy of that data by generating check codes of the data to be validated at both primary and secondary sites in a continuously running remote data shadowing system. The validation session runs concurrently with the data shadowing so as not to disrupt the data shadowing. Each data validation session is assigned a copy start time, for example, a time preceding a time of a consistency group, for defining when the check code for data at the primary should be compared to a check code of the data at the secondary. The check code of the data at the secondary site is taken at a time that is the equivalent logical point-in-time of that data at the primary site even though the respective data contents may be different in real time.

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