DISK ARRAY SUBSYSTEM, CACHE CONTROL METHOD FOR THE DISK ARRAY SUBSYSTEM, AND PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a disk array subsystem, or the like, capable of continuing fast write operations, even when a memory controller becomes unavailable. PSOLUTION: The disk array subsystem includes a first cluster and a second cluster which share a disk device and stores the same cache data therein. The first cluster includes: a first cache memory wherein at least a part of cache data is stored, and a first memory controller for determining a storage address of cache data; the second cluster includes a second cache memory wherein at least a part of cache data is stored, and a second memory controller for determining a storage address of cache data; and the first and second memory controllers mutually independently determine the storage addresses of cache data. PCOPYRIGHT: (C)2010,JPO&INPIT