Patent ID: 8001318
Filing Date: 2011-08-16
Classification: G06F

Abstract:
1. A storage system for storing client data, the storage system comprising: at least one low-latency random read memory (LLRRM) device, the LLRRM device comprising a plurality of active erase-units that store client data and a plurality of free erase-units that do not store client data; active and free wear count (WC) data structures, the active WC data structure comprising an entry for each active EU in the LLRRM device, the free WC data structure comprising a plurality of entries for a plurality of free EUs in the LLRRM device, each entry in the active and free WC data structures comprising a wear count associated with an EU, the wear count indicating a number of erase cycles performed on the EU; and a wear leveling module executed by a processor, the wear leveling module configured for: