After you take these steps, remote copy operations will be resumed. The primary storage system will be able to respond to read journal commands issued by the secondary storage system.
Note: If you want to power off both the primary and secondary storage systems at the same time, please see the next section.
Note: If you turn the power off without changing the status of all data volume pairs to Suspend, and then you turn the power back on, the status of all data volume pairs could be suspended according to a failure.
When You Power Off the Secondary Storage System
If you want to power off the secondary storage system during remote copy operations, you must ensure, before powering off the storage system, that all data volume pairs or mirrors (i.e., pairs of journal groups) are split, and that the status of all the data volume pairs is Suspend.
If more than one primary and secondary storage systems are used with extended consistency groups, you must split all data volume pairs in the extended consistency groups before powering off the secondary storage systems. When powering off the secondary storage systems, you must power off the supervisor DKC first, and then the subordinate DKCs.
Caution: If you want to power off the secondary storage system, please contact your Hitachi account team and ask them to power off the storage system.
If data volume pairs are split and the secondary storage system is powered off as mentioned above, you can resume remote copy operations by taking the following steps:
1.Power on the secondary storage system.
If more than one secondary storage system is to be used with extended consistency groups, power on the subordinate DKCs first, and then the supervisor DKC.
2.If the secondary storage system is ready to resume remote copy operations, please restore the data volume pairs that have been split, and then confirm that the status of the data volume pairs is Pending or Duplex. This operation must be performed at the primary site.
After you take these steps, remote copy operations will be resumed. The secondary storage system will be able to issue read journal commands to the primary storage system.
Note: If you want to power off both the primary and secondary storage systems at the same time, please see the next section.
Important: If you turn the power off without changing the status of all data volume pairs to Suspend, and then you turn the power back on, the status of all data volume pairs could be suspended according to a failure.
Chapter 5 Configuring Storage Systems and Logical Paths |
