Learn About RAID Controller Module Ownership and Performance

The Total I/O data provided by the Performance Monitor is useful for monitoring the I/O activity of a specific  and a specific , which can help identify possible high-traffic I/O areas.

Identify actual I/O patterns to the individual virtual disks and compare those with the expectations based on the application. If a particular RAID controller module has considerably more I/O activity, consider moving virtual disks to the other RAID controller module in the .

You might notice a disconsistency in the Total I/Os (workload) of RAID controller modules, for example, the workload of one RAID controller module is heavy or is increasing over time while that of the other RAID controller module is lighter or more stable. In this case, consider changing the  of one or more virtual disks to the RAID controller module with the lighter workload. Use the virtual disk Total I/O statistics to determine which virtual disks to move.

Important: The RAID controller module owner of a  in a  is determined by the RAID controller module owner of the  in the primary storage array. If the RAID controller module owner of the primary virtual disk is RAID Controller Module A, then the RAID controller module owner of the associated secondary virtual disk in the secondary storage array is also RAID Controller Module A. RAID Controller Module ownership changes on the primary side automatically propagate to corresponding RAID controller module ownership changes on the secondary side.

Related Topics

Changing RAID Controller Module Ownership of a Disk Group or Virtual Disk

Learn About Tuning Storage Array Performance

Monitoring Performance