A hard disk drive (HDD) comprises nonvolatile semiconductor (NVS) memory, a life monitor module, and a hard disk controller (HDC) module. The life monitor module evaluates cumulative usage of the NVS memory and selectively generates a usage signal based upon the evaluation. The hard disk controller (HDC)...http://www.google.fr/patents/US7945728?utm_source=gb-gplus-shareBrevet US7945728 - Storage device cache
