Creating journals and adding journal volumes

You create journals and add and configure journal volumes in the same procedure. For adding journal volumes to an existing journal, see Adding an additional journal volume to an existing journal.

Prerequisite information

• Review the following:

• In the Universal Replicator User Guide, see the sections on system requirements, planning journals, and planning journal volumes.

• The journal’s mirror status must be Active, Stopped, Hold, Holding, or Hold(Failure).

• The journal cannot be in use.

• Pair operations involving the journal cannot be in progress.

• Virtual storage machine volumes cannot be used as journal volumes.

Procedure

1. Open the Journals window.

In Command Suite: On the Resources tab, expand the Storage Systems tree, right-click the target storage system, and click Journals.

In Device Manager - Storage Navigator: In the Storage System tree, click Replication > Journals.

2. In the Journals window, click the Journals tab.

3. From the Actions menu, click Journals > Create Journals.

4. In the Create Journals window, for Journal ID, select a journal ID from the list.

5. In the Journal Volume Selection box, click Select Journal Volumes.

6. In the Select Journal Volumes dialog box, from the Available LDEVs table, select the journal volumes to be registered to the journal, and click Add. The volumes are moved to the Selected Journal Volumes table.

Virtual storage machine volumes cannot be used as journal volumes.

To remove a volume from the Selected Journal Volumes table, select it and click Remove.

Click OK when finished.

7. Optional. For MP Unit, you can specify an MP unit from MPB0 to MPB7. Auto is available when one or more units can be assigned automatically. When Auto cannot be selected, the default is the unit with the lowest number.

8. Optional. For Inflow Control, you can specify whether to restrict the flow of update I/O to the journal volume. Enabling this setting delays the response to hosts. Also, by restricting the inflow of data to one journal, you can allow other journals with higher-priority data unrestricted inflow.

- Enable restricts inflow.

- Disable does not restrict inflow. When Disable is selected and metadata or journal data is full, update I/Os might stop.

9. Optional. For Data Overflow Watch, you can specify the number of seconds for the system to monitor write data to the journal volume when the journal volume is full (100%). Range is 0-600 seconds. The default is 60.

10. Optional. For Cache Mode, you can specify whether to store journal data in the cache memory on the secondary side (restore journal).

- Enable: Journal data will be stored in the cache. When there is insufficient space in the cache, journal data will also be stored into the journal volume. Enable is available only for journal volumes of RAID-5 or RAID-6.

- Disable: Journal data will not be stored in cache but in the journal volume. Disable is the only setting possible for non-RAID-5 or RAID-6 journal volumes and external volumes.

 This setting does not effect master journals unless the CCI horctakeover command is used to change a master journal into a restore journal.

11. Click Finish.

12. In the Confirm window, review the settings and enter a task name in the Task Name box. To review additional information about the journal, select the journal and click Detail.

13. Click Apply to save your settings to the system.