System and method for maintaining data integrity of data on a storage device

A system for maintaining data integrity of data in a storage device comprising:

• a hardware processor configured to:
• determine whether checksums stored in a checksum archive and associated with data on the storage device mounted on a computer system are trusted or untrusted, wherein the checksum archive is on a different storage device;
• responsive to determining that the checksums in the checksum archive are trusted, retrieve the checksums from the checksum archive, otherwise initializing the checksums as unknown;
• detect a storage request for an identified block of the storage device;
• when the storage request is a write request, calculate a checksum of the data in the identified block and updating the checksum in memory of the computer system;
• when the storage request is a read request and an in-memory checksum associated with the identified block is not unknown, i) calculate the checksum of the data in the identified block and comparing the calculated checksum with an in-memory checksum associated with the identified block and ii) determine that a data corruption has occurred when the calculated checksum does not match the in-memory checksum;
• and
• save checksums associated with each of the data blocks of the storage device where the data corruption has not occurred to the checksum archive.

A non-transitory computer-readable medium, storing computer-executable instructions thereon for executing, on a computing system, a computer process for maintaining data integrity of data in a storage device, the computer process comprising:

• determining whether checksums stored in a checksum archive and associated with data on the storage device mounted on a computer system are trusted or untrusted, wherein the checksum archive is on a different storage device;
• responsive to determining that the checksums in the checksum archive are trusted, retrieving the checksums from the checksum archive, otherwise initializing the checksums as unknown;
• detecting a storage request for an identified block of the storage device;
• when the storage request is a write request, calculating a checksum of the data of the identified block and updating the checksum in memory of the computer system;
• when the storage request is a read request and an in-memory checksum associated with the identified block is not unknown, i) calculating the checksum of the data in the identified block and comparing the calculated checksum with an in-memory checksum associated with the identified block, and ii) determining that a data corruption has occurred when the calculated checksum does not match the in-memory checksum;
• and
• saving checksums associated with each of the data blocks of the storage device where the data corruption has not occurred to the checksum archive.