Dell MD3200i, MD3220i Storage Array Performance During Virtual Disk Copy, Setting Copy Priority

170 Configuration: Premium Feature—Virtual Disk Copy

In the

Select source virtual disk

are, select the appropriate virtual disk and

click Next.

The

Select Target Virtual Disk and Copy Priority

window is displayed.

In the

Select target virtual disk

area, select the appropriate virtual disk

In the

Select copy priority area

, select the relevant copy priority and click

The Preview window displays the summary of your selections.

Ty p e

yes

, and click

Finish

NOTE: Operation in Progress icons appear on the source virtual disk and the target

virtual disk while the virtual disk copy has a status of In Progress or Pending.

For more information, see the PowerVault Modular Disk Storage Manager

online help topics.

Storage Array Performance During Virtual Disk

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.

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:

book.book Page 170 Wednesday, May 26, 2010 2:14 PM