FlashCopy session properties

The properties are displayed on different tabs in the notebook. Use the Session Options tab to set properties that apply to the entire session. Use the H1-T1 Options tab to set properties that apply to the role pair.

Session Options

Enter the properties for the session.

Description

Type the description for this session.

System or sysplex

Select the z/OS system or sysplex that you want to associate with the session. When this option is set, the Flash command is submitted through the z/OS connection to that system or sysplex to provide performance improvements during the FlashCopy process. To enable this feature, volumes in the session must be attached to the system or sysplex and IOS APAR OA59561 must be applied.

If you select No Association, then the session submits the command in the regular manner and the performance advantage of submitting the FlashCopy operation through the system or sysplex will not be applicable.

This option is displayed only if the copy services management server is installed on or connected to a z/OS host system.

H1-T1 Options

Enter the properties for the role pair.

Incremental

Select this option to apply incremental changes to the target volume. After the initial FlashCopy® operation, only data that changed on the source volume since the last FlashCopy operation was performed is copied to the target volume. If the multiple incremental feature is supported on the storage system, it will be used.

If you select this option, a persistent FlashCopy relationship is created regardless of whether you select the Persistent check box.

Persistent

Select this option to keep the FlashCopy relationship established on the hardware after all source tracks are copied to the target volume. If you do not select this option, the local replication relationship ends after the target volume contains a complete point-in-time image of the source volume.

No Copy

Select this option if you do not want the hardware to write the background copy until the source track is written to. Data is not copied to the target volume until the blocks or tracks of the source volume are modified.

This option is required for space-efficient volumes.

Fail Flash if target is online (CKD only)

Select this option to fail any command for a FlashCopy relationship if the target volume is in the Online state. For more information about this state, refer to the documentation for the storage system.

This option applies only to count key data (CKD) volumes.

Reset target reserves (FB only)

Select this option to reset the SCSI reserves on the FlashCopy target volumes.

This option applies only to fixed block (FB) volumes.

Note: The SCSI reserves are reset only when the Flash command is issued, after the Reset target reserves (FB only) option is selected.

Allow FlashCopy target to be Metro Mirror source

Select this option to enable the FlashCopy operation if the target volume of the FlashCopy relationship is also the source volume of a Metro Mirror relationship. If this option is not selected, the FlashCopy operation fails.

Requirement: This option requires that the IBM Remote Pair FlashCopy option is available for your IBM DS8000 storage system. To determine whether you can use the IBM Remote Pair FlashCopy option with your IBM DS8000 storage system, see the IBM DS8000 documentation for microcode level that you are using.

Select one of the following options to specify whether you want to maintain consistency, if possible:

Do not attempt to preserve Metro Mirror consistency

Click this option if you want the FlashCopy operation to complete without preserving consistency of the Metro Mirror relationship on the remote site. The FlashCopy operation does not occur on the remote site.

Attempt to preserve Metro Mirror consistency, but allow FlashCopy even if Metro Mirror target consistency cannot be preserved

Click this option to preserve the consistency of the Metro Mirror relationship at the target of the FlashCopy relationship when both the source and target of the FlashCopy relationship are the source of a Metro Mirror relationship. If the consistency cannot be preserved, a full copy of the Metro Mirror relationship at the target of the FlashCopy relationship is performed. To preserve consistency, parallel FlashCopy operations are performed on both sites if possible.

Attempt to preserve Metro Mirror consistency, but fail FlashCopy if Metro Mirror target consistency cannot be preserved

Click this option to prevent a full copy from being performed over the Metro Mirror link. Instead, if possible, parallel FlashCopy operations are performed on both sites. If the consistency cannot be preserved, the flash for the FlashCopy relationships fails, and the data of the Metro Mirror relationship at the target of the FlashCopy relationship is not changed.