Creating a FlashCopy target volume on an existing Metro Mirror source volume using DS CLI,

Complete this task to create a FlashCopy^® target volume on an existing Metro Mirror source volume.

Use the mkflash command with the tgtpprc parameter to create a FlashCopy target volume on an existing Metro Mirror source volume. The FlashCopy takes a point-in-time copy of a source volume, and then Metro Mirror makes a copy of the FlashCopy target volume at a remote site.

You can perform this task using either the DS CLI or the DS Storage Manager.

Perform the following steps to create a FlashCopy target volume on an existing Metro Mirror source volume with DS CLI commands. The example commands in this task are shown in two formats. The first format shows the type of information that the command requires. The second format is an example command with declared values for the variables.

Issue the mkflash command with the tgtpprc parameter to create a FlashCopy target volume on an existing Metro Mirror source volume. Enter the mkflash command at the dscli command prompt with the following parameters and variables:
dscli>mkflash -dev storage_image_ID -tgtpprc sourcevolumeID:targetvolumeID
Example
```
dscli>mkflash -dev IBM.1750-68FA150 -tgtpprc 0001:0004
```
A confirmation message is issued for each successful FlashCopy pair that is created.

Note: The tgtpprc parameter can also be used with the resyncflash command. When you issue a resyncflash command to a FlashCopy relationship, only the new write operations to the source since the last resynchronization are copied to the target. This minimizes the data that is copied to the remote site when you also use the tgtpprc parameter. The specified parameters in the resyncflash command replace the parameters in the existing relationship. In order to keep the initial record, persist, and tgtpprc parameters, the record, persist, and tgtpprc parameters must be specified in the resyncflash command.
Issue the resyncflash command with the tgtpprc parameter to resynchronize FlashCopy relationships and create a FlashCopy target volume on an existing Metro Mirror source volume. Enter the resyncflash command at the dscli command prompt with the following parameters and variables:
dscli>resyncflash -dev storage_image_ID -record -persist -tgtpprc sourcevolumeID:targetvolumeID

Example
```
dscli>resyncflash –dev IBM.1750-68FA120 
-record -persist -tgtpprc 0100:0200
```
The resulting output
```
Date/Time: Sun Aug 11 02:23:49 PST 2004 IBM DS CLI Version: 5.0.0.0 
DS: IBM.1750-68FA120

FlashCopy pair 0100:0200 successfully incremented.
```