Patent ID: 8713254

Claim:
A method comprising: receiving a newly-received data portion for storing within a cache memory system, wherein the cache memory system includes a volatile, solid-state, cache memory system and a non-volatile, solid-state, cache memory system; determining if the newly-received data portion corresponds with at least one data portion previously written to a non-volatile, memory system, wherein the non-volatile, memory system includes a non-volatile, electromechanical memory system; and if the newly-received data portion does not correspond with at least one previously-written data portion, storing the newly-received data portion within the volatile, solid-state, cache memory system using a protected data storage methodology; applying a data definition label to the newly-received data portion, the data definition label configured to indicate whether the newly-received data portion has or has not been stored previously, including applying a dirty data label to the newly-received data portion if the newly-received data portion has not been stored previously to the non-volatile, electromechanical memory system; if the newly-received data portion is destaged from the volatile, solid-state, cache memory system to the non-volatile, solid-state, cache memory system, maintaining the dirty data label on the newly-received data portion; and updating the data definition label to a clean data label when the newly-received data portion is written to the non-volatile, electromechanical memory system.