PerformanceOptimizer can also be used to non-disruptively migrate volumes (LUNs) to a different tier of storage: move LUNs on SAS drives to SATA drives (and vice-versa) without bringing down the application.

PerformanceOptimizer provides the following functions:

	Identifies bottlenecks Shows the I/O concentration on disks as a "busy ratio" and in three-color-coding, with customizable thresholds.
	Suggest plans for reducing/eliminating bottlenecks Provides a list of plans that would reduce the I/O concentration on hotspots by moving volumes from very busy disks to less busy disks. The plans are ranked according to predicted effectiveness.
	Provides plan effectiveness Displays "what if" analysis of how effective the plan would be according to historical data. The chart of "what if" performance also shows the predicted average busy ratio and maximum busy ratio.
	Executes plan non-disruptively The selected plan to eliminate the hotspot can be carried out immediately or at a specified time. The migration of the volume is carried out in the background such that applications can still access the volume.
	Migrate LUNs to different Disk Pools non-disruptively Select up to 8 LUNs and migrate them to Disk Pools of your choice simultaneously. The LUN remains accessible for application throughout the migration. This can be especially useful for adjusting a tiered storage approach - migrating LUNs to/from high- and low-performance drives. It can also be used for changing the RAID protection level of data.