PowerHA now supports logical unit (LUN) level switching on the SAN Volume Controller (SVC), Storwize V7000, and Storwize V3700. This support is similar to the LUN level switching available for System Storage DS8000 allowing users to switch an independent auxiliary storage pool (IASP) at a LUN level between logical partitions in a PowerHA cluster. This is not a disaster recovery mechanism but a high availability mechanism as a single copy of the IASP is switched between LPARs by altering the host connections on the storage subsystem. This technology can be used together with copy services (FlashCopy, Metro Mirror, and Global Mirror) on the SVC and Storwize V7000 as well as IBM i Geographic Mirroring.
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