STORAGE SYSTEM AND METHOD OF OPERATING THEREOF

• Main Authors: WINOKUR ALEX, KOPYLOVITZ HAIM
• Format: Patent
• Language: English
• Published: 25.08.2011
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

There are provided a storage system, storage control unit and method of operating thereof. A storage system comprises a permanent storage subsystem comprising a first cache memory and a non-volatile storage medium, and a storage control unit operatively coupled to said subsystem and to a second cache memory operable to cache "dirty" data pending to be written to the permanent storage subsystem and to enable, responsive to at least one command by the control storage unit, destaging said "dirty" data or part thereof to the permanent storage subsystem. The storage control unit is operable to determine achievement of a "writing criterion", to provide, upon achieving, at least one command to the permanent storage subsystem requiring flushing destaged data or part thereof from the first cache memory to the non-volatile storage medium, and to provide at least one command to the second cache memory requiring reclassification of the "washed" data or a respective part thereof into the "clean" data, wherein the storage control unit is further operable to configure the "writing criterion" responsive to indicating one or more predefined events during an operation of the storage system.