Minimum software required: 12.1.0.2 BP11

When a hard disk hits a predictive failure or true failure, and data needs to be rebalanced out of it, some of the data that resides on this hard disk might have been cached on the flash disk, providing better latency and bandwidth accesses for this data. To maintain an application's current performance SLA, it is critical to rebalance the data while honoring the caching status of the different regions on the hard disk during the cell-to-cell offloaded rebalance.

This feature provides significant performance improvement compared to earlier releases for application performance during a rebalance due to disk failure or disk replacement.

When data is rebalanced from one cell to another, the data that was cached on the source cell is also cached on the target cell.