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Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

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Virtual disk ownership

The MD Storage Manager can be used to automatically build and view virtual disks. It uses optimal settings to stripe the disk group. Virtual disks are assigned to alternating RAID controller modules when they are created. This default assignation provides a simple means for load balancing the workload of the RAID controller modules.
Ownership can later be modified to balance workload according to actual usage. If virtual disk ownership is not manually balanced, it is possible for one controller to have the majority of the work, while the other controller is idle. Limit the number of virtual disks in a disk group. If multiple virtual disks are in a disk group, consider:
  • The impact each virtual disk has on other virtual disks in the same disk group.
  • The patterns of usage for each virtual disk.
  • Different virtual disks have higher usage at different times of day.
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