Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

Copy priority has five relative settings, which range from highest to lowest. The highest priority supports the virtual disk copy, but I/O activity might be affected. The lowest priority supports I/O activity, but the virtual disk copy takes longer. You can change the copy priority at three different times in the operation:

• Before the virtual disk copy begins
• While the virtual disk copy has a status of In Progress
• After the virtual disk copy has completed re-creating a virtual disk copy using the recopy virtualDiskCopy command

When you create a virtual disk copy pair and after the original virtual disk copy has completed, the target virtual disk is automatically defined as read-only to the hosts. The read-only status of the target virtual disk ensures that the copied data on the target virtual disk is not corrupted by additional writes to the target virtual disk after the virtual disk copy is created. Maintain the read-only status when the following conditions apply:

• You are using the target virtual disk for backup purposes
• You are copying data from one disk group to a larger disk group for greater accessibility
• You are planning to use the data on the target virtual disk to copy back to the source virtual disk in case of a disabled or failed snapshot virtual disk

At other times you might want to write additional data to the target virtual disk. You can use the set virtualDiskCopy command to reset the read/write permission for the target virtual disk.

The following syntax is the general form of the command:

set virtualDiskCopy target [targetName] [source
                                    [sourceName]] copyPriority=(highest | high |
                                    medium | low | lowest) targetReadOnlyEnabled=(TRUE | FALSE)
                                 

The following example shows how to change parameters using the set virtualDiskCopy command:

client>smcli 123.45.67.89 -c "set virtualDiskcopy
                                    target [\"Obi_1\"] copyPriority=highest
                                    targetreadonlyenabled=false;"
                                 

The following example is the script file version of the command:

set virtualDiskcopy target ["Obi_1"] copyPriority=
                                    highest targetreadonlyenabled=false;