System and method for consistency verification of replicated data in a recovery system

A system comprising:

• a recovery system configured to protect data of a protected storage system, wherein the recovery system comprises:
• a target disk configured to store a replica of the protected storage system from before a time window;
• a journal configured to store data and metadata of write operations to the protected storage system that occurred during the time window;
• and
• a processor configured to verify consistency of the replicated data by:
• storing in the journal a first bit string that uniquely identifies a selected chunk of the protected storage system from a specified time point and comprises a copy of the selected chunk;
• and
• when the specified time point goes past the limit of the time window, comparing, bit by bit, the first bit string with a second bit string that uniquely identifies a corresponding chunk in the target disk;
• and
• reporting results of the comparison to a user.

A computer-implemented method comprising:

• obtaining data and metadata of a write operations in a protected storage system, storing a copy of the data in content entries of a journal;
• storing at least a portion of the metadata in chronologically ordered metadata entries of the journal;
• associating the metadata entries with respective content entries;
• periodically applying data received before a time period from the journal to a target disk configured to store a replica of a protected storage system from before the time period;
• obtaining a first bit string that substantially uniquely identifies a selected chunk of the protected storage system from a specified time point and comprises a copy of the selected chunk;
• storing the first bit string in the journal;
• when data related to write operations that were performed before the specified time point has been applied to the target disk, comparing, bit by bit, the first bit string with a second bit string that substantially uniquely identifies a corresponding chunk that is stored in the target disk and comprises a copy of the corresponding chunk that is stored in the target disk;
• and
• reporting results of the comparison to a user.