Asynchronous Parity Computation in RAID Storage Systems

The patent applies preliminary action by performing parity computation after data is already written to the array, rather than during the write operation. The system writes data to the array first, then computes parity in the background using previously read data and the new written data. This separates the write operation from the parity computation, eliminating the need for complex synchronous coordination while ensuring data redundancy is eventually established.

The patent implements preliminary action by completing the data write operation to the array before initiating parity computation. The write operation returns immediately to the host, while parity computation proceeds in the background. This asynchronous approach eliminates the waiting time that would otherwise be required for synchronous parity computation, thereby improving write operation speed while still ensuring data redundancy is established.

The patent applies preliminary action by separating the data write operation from the parity computation step. The system writes data to the array first, then computes parity in the background using the newly written data and previously stored data. This allows the write operation to be acknowledged to the host immediately without waiting for parity computation to complete, thereby eliminating acknowledgement delay while maintaining data consistency through the background parity computation process.

The patent applies preliminary action by first writing data to the array in a reliable manner before initiating asynchronous parity computation. The system ensures data is safely stored in the array with proper redundancy mechanisms in place before background parity computation begins. This sequencing ensures that even if parity computation fails or is interrupted, the data itself is already safely stored and can be recovered using standard RAID recovery procedures, thereby minimizing data loss risk while maintaining I/O speed improvements.