System and method for non-disruptive check of a mirror
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United States of America Patent
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Oct 30, 2012
Grant Date -
Jan 29, 2009
app pub date -
May 30, 2008
filing date -
Jul 26, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system and method for verifying the consistency of mirrored data sets between source and destination storage systems is provided. A destination verification module sends version information to the source storage system where the source verification module determines whether the source and destination storage systems are utilizing compatible versions of the verification module. If the destination verification module receives an acceptable version from the source, the destination module then determines a base PCPI to utilize for verification and sends a PCPI identifier of the base PCPI to the source. The source verification module generates and transmits a data stream consisting of comprising of checksum information. The destination verification module compares the received data stream with checksum information retrieved from disk. If there are mismatches, i.e. the received data differs from the data retrieved from disk, the destination verification module logs the data mismatches in a verification log file.
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