Patent ID: 7328392

Claim:
A method for checking correctness of object data stored in a disk array system, comprising: providing the disk array system including a storage device, a controller, and a RAID control function, writing the object data to an object data area in said storage device by: extracting a part of said object data as first data, embedding a check code in said first data via a first operation to provide check-code embedded first data with a data length identical with a data length of said first data, storing said first data in a control area which is separated from the object data area in said storage device, inserting said check-code embedded first data back into said object data to provide check-code embedded object data, and storing the check-code embedded object data in said storage device; and reading said check-code embedded object data from said storage device by: fetching said check-code object data from said storage device, subjecting said fetched data to a second operation with the check code, and comparing data resulted from the second operation and the first data stored in said control area thereby checking the correctness of said object data after being stored in said storage device.