SYSTEMS AND METHODS FOR ELIMINATING WRITE-HOLE PROBLEMS ON PARITY-BASED STORAGE RESOURCES DURING AN UNEXPECTED POWER LOSS

摘要

In accordance with embodiments of the present disclosure, a method may include, during a cache flush of data of a cache entry from a non-volatile memory to a storage resource, wherein the non-volatile memory is integral to a persistent write-back cache and storing the data in response to a power event associated with the write-back cache: (a) calculating a calculated parity value by undertaking a read-modify-write operation with respect to the storage resource; and (b) storing the calculated parity value and a target address of the storage resource associated with the calculated parity value in a parity journal.