Verification and restore of replicated data using a cloud storing chunks of data and a plurality of hashes

A computer implemented method, the method comprising:

• executing computer-executable program logic by one or more processors on a computer having memory storing the computer-executable program logic, to implement the steps of:
• downloading a plurality of hashes from a cloud corresponding to a set of backed up hashes for a set of chunks, wherein each chunk of the set of chunks is stored in the cloud and corresponds to a portion of a LUN at a production site at a point in time;
• determining a second plurality of hashes for the LUN on the production site;
• and
• comparing each of the second plurality of hashes for the LUN with each of the plurality of hashes downloaded from the cloud to determine if the compared hashes match;
• downloading data, corresponding to one or more non-matching hashes, from the cloud, wherein the data corresponds to one or more chunks corresponding to the one or more non-matching hashes;
• and
• restoring the data that was downloaded to the LUN on the production site.

A computer program product comprising:

• a non-transitory computer readable medium encoded with computer executable program code, the code is configured to cause execution, by one or more processors, of:
• downloading a plurality of hashes from a cloud corresponding to a set of backed up hashes for a set of chunks, wherein each chunk of the set of chunks is stored in the cloud and corresponds to a portion of a LUN at a production site at a point in time;
• determining a second plurality of hashes for the LUN on the production site;
• comparing each of the second plurality of hashes for the LUN with each of the plurality of hashes downloaded from the cloud;
• if corresponding hashes do not match:
• downloading data corresponding to one or more non-matching hashes from the cloud;
• wherein the data corresponds to one or more chunks corresponding to the one or more non-matching hashes;
• and
• restoring the data to the LUN on the production site.