Dell PowerVault MD3620i Owner's Manual - Page 177
Storage Array Performance During Virtual Disk Copy, Setting Copy Priority
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Storage Array Performance During Virtual Disk Copy The following factors contribute to the overall performance of the storage array: • I/O activity • Virtual disk RAID level • Virtual disk configuration-Number of drives in the virtual disk groups • Virtual disk type-Snapshot virtual disks might take more time to copy than standard virtual disks During a virtual disk copy, resources for the storage array are diverted from processing I/O activity to completing a virtual disk copy. This affects the overall performance of the storage array. When you create a new virtual disk copy, you define the copy priority to determine how much controller processing time is diverted from I/O activity to a virtual disk copy operation. Setting Copy Priority You can use the Copy Manager to select the rate at which a virtual disk copy completes for a selected copy pair. You can change the copy priority for a copy pair at any of these times: • Before the virtual disk copy begins • While the virtual disk copy has a status of In Progress • When you re-create a virtual disk copy To set copy priority: 1 In the AMW, select Virtual Disk Copy Copy Manager. The Copy Manager window is displayed. 2 In the table, select one or more copy pairs. Configuration: Premium Feature-Virtual Disk Copy 177