Emc IP Holding Company LLC

Emc Corporation

Zhipeng Hu

Jian Gao

Wei He

Hongpo Gao

Ruiyong Jia

Peter Puhov

Long Zhang

Huibing Xiao

Marc C Cassano

Shay Harel

Lei Xue

Peng Xie

A technique for managing system drive integrity in data storage systems is disclosed. A plurality of storage drive data structures configured to store data associated with a system drive is created, wherein each storage drive data structure includes a data structure initialization string, a unique storage system identifier, a plurality of unique system drive identifiers associated with respective system drives, and a board replacement flag. Respective data structures are stored on each of the plurality of corresponding system drives. The contents of one or more of the data structures stored on one or more of the plurality of systems drives are read via an instruction initiated by a data store system. A drive type for one or more system drives is determined based on the contents.

Managing system drive integrity in data storage systems

Embodiments of the present disclosure relate to methods and apparatuses for data copy avoidance where after a data access request is received from the first storage node, what is sent by a second storage node to the first storage node is not an address of a second storage space in a second mirrored cache, but an address of a first storage space in a first cache corresponding to the second storage space. In this way, data access may be implemented directly in the first cache on the first storage node, and can reduce data communication across different storage nodes, eliminate potential system performance bottlenecks, and enhance data access performance.

Data copy avoidance across a storage

Techniques for a method of processing events are described. A first notification is received regarding an occurrence of a first event identifying a first physical drive coming online. It is determined whether the first event is dependent on one or more other events that have not yet occurred. If it is determined that the first event depends on one or more other events that have not yet occurred, performing first processing to defer processing of the first event until the one or more other events have occurred. If it is determined that the first event does not depend on the one or more other events that have not yet occurred, the first event is processed.

Deferred drive processing

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Beijing, China

Zhipeng Hu