Methods and systems for implementing shared disk array managemen

Details Methods and systems for implementing shared disk array managemen Methods and systems for implementing shared disk array managemen

1999-03-03

2000-11-14

Hua, Ly V.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

714 6, 714 5, 714 11, 714 12, H04L 122, H04K 1000

Patent

active

061484148

ABSTRACT:
Multiple Array Management Functions (AMFs) are connected to multiple redundancy groups over a storage area network (SAN), such as a fiber-channel based SAN. The multiple AMFs share management responsibility of the redundancy groups, each of which typically includes multiple resources spread over multiple disks. The AMFs provide concurrent access to the redundancy groups for associated host systems. When a host requests an AMF to perform an operation on a resource, the AMF synchronizes with the other AMFs sharing control of the redundancy group that includes the resource to be operated on, so as to obtain a lock on the resource. While performing the operation, the AMF send replication data and state information associated with the resource such that if the AMF fails, any of the other AMFs are able to complete the operation and maintain data reliability and coherency.

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Massiglia, Paul, "Fibre Channel, Storage Area Networks, And Disk Array Systems" FC WhitePaper for Web.doc, .RTM.Adaptec, Inc. Apr. 13, 1998.

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