HP StorageWorks 2300 Family Modular Smart Array CLI reference guide (500912-002, July 2010)

HP StorageWorks 2000 G2 Modular Smart Array CLI Reference Guide 85
Cache redundancy mode
In the storage system’s default operating mode, Active-Active, data for volumes configured to use
write-back cache is automatically mirrored between the two controllers. Cache redundancy has a slight
impact on performance but provides fault tolerance.
The operating mode applies per storage system, not per volume.