Starting copy process

Fields

Start Options

Select one of the following start options:

Forced start

Select this option to start copying even if it leads to a temporary loss of consistency. This option is required if the consistency group is not synchronized and is in the Idling or Consistent Stopped state.

Mark as clean

Select this option if you want to start the Metro Mirror or Global Mirror relationship without overwriting any changes which were made to the remote VDisk while the relationship was stopped. As a result, the two copies may not be synchronized. The clean option is used when you begin with synchronized primary and secondary VDisks that has been stopped with write access to the secondary VDisk enabled. Enabling write access moves the relationship to the Idling state and means that while the relationship is in this state, data can be changed on the secondary VDisk in the relationship. When the relationship is restarted without using the Mark as clean option, all data that has been changed on the secondary VDisk is overwritten with data from the primary VDisk and the two copies are synchronized. Operators should only use the mark as clean option when they fully understand the consequences of unsynchronized VDisks in theGlobal Mirror relationship. One scenario which can make use of the Mark as clean option is to use tape backups to perform the initial synchronization of a Global Mirror relationship using the following procedure:.

1. Create Global Mirror relationship, specifying that the primary and secondary VDisks are synchronized. Use the Select Options panel in the Create Metro Mirror or Global Mirror Relationship wizard to specify the synchronized option for the relationship.
2. Stop the or Global Mirror relationship, enabling write access for the secondary VDisk to allow updates to the recovery site. Use the Stopping Copy Process panel to enable write access for the target VDisk.
3. Stop applications at the primary site.
   Note: Stopping the applications before backing up the data ensures that the backup that you transfer to the recovery site is a consistent copy which can be used to directly recover the primary site.
4. Backup primary VDisk by either backing up its data directly to tape or use FlashCopy feature to copy the data and then transfer the copied data to tape.
5. Restart the applications.
6. Move the backup tape to the recovery site and copy the data from the backup tape to the secondary VDisks in the Global Mirror relationship.
7. Restart the Global Mirror relationship using the Mark as clean option, which instructs Global Mirror to only copy the changes in data on the primary VDisks that have occurred since the relationships were last stopped.

Copy Direction

Specify the copy direction. You must specify the copy direction if this relationship is in the Idling state. The following values are possible:

Master > Auxiliary (primary = master)

The master VDisk performs the role of primary VDisk and the copy direction changes from master to auxiliary.

Auxiliary > Master (primary = auxiliary)

The auxiliary VDisk performs the role of primary VDisk and the copy direction changes from auxiliary to master.

Do not set or change the copy direction

The copy direction remains the same.