Accessing multiple non-volatile semiconductor memory modules...

Details Accessing multiple non-volatile semiconductor memory modules... Accessing multiple non-volatile semiconductor memory modules...

2011-01-04

2011-01-04

Kim, Hong (Department: 2185)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006130, C714S006130, C711S103000, C711S005000, C711S118000, C711S114000, C711S143000

Reexamination Certificate

active

07865761

ABSTRACT:
A data storage apparatus (e.g., a flash memory appliance) includes a set of memory modules, an interface and a main controller coupled to the each memory module and to the interface. Each memory module has non-volatile semiconductor memory (e.g., flash memory). The interface is arranged to communicate with a set of external devices. The main controller is arranged to (i) store data within and (ii) retrieve data from the non-volatile semiconductor memory of the set of memory modules in an uneven manner on behalf of the set of external devices to unevenly wear out the memory modules over time. Due to the ability of the data storage apparatus to utilize each memory module through its maximum life and to stagger the failures of the modules, such a data storage apparatus is well-suited as a high availability storage device, e.g., a semiconductor cache for a fault tolerant data storage system.

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