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.

Before you begin

• Review the following:

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

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

• The journal cannot be in use.

• Pair operations involving the journal cannot be in progress.

• Cache Residency Manager settings cannot be defined for the volumes.

Procedure

1. Open the Journals window:

In Command Suite:

1. On the Resources tab, expand the Storage Systems tree.

2. Right-click the target storage system, and click Journals.

In Device Manager - Storage Navigator:

1. In the Explorer pane, expand the Storage Systems tree.

2. Expand the target storage system tree, expand Replication, and click Journals.

2. In the Journals tab, click Create Journals.

3. In the Create Journals window, for System Type, select Open.

4. For Journal ID, select a journal ID from the list.

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

6. In the Select Journal Volumes dialog box, from the Available LDEVs table, select the journal volumes (one or two) to be registered to the journal, and click the Add button. The volumes are now listed in the Selected Journal Volumes table.

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

Click OK when finished. If you register two journal volumes at the same time, the volume with the smaller LDEV number is registered as the journal volume, and the other volume is registered as the reserve journal volume.

7. In the Create Journals window, select a Journal Type Option.

• Select Standard for journals in UR standalone pairs and pairs in a 3DC configuration.

8. Optional. For MP Blade, you can specify an MP blade from MPB0 to MPB7. Auto is available when one or more blades can be assigned automatically. When Auto cannot be selected, the default is the blade with the lowest number.

9. 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 leaves inflow unrestricted. With Disable selected, if metadata or journal data is full, update I/Os might stop.

10. 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.

11. 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 affect master journals unless the CCI horctakeover command is used to change a master journal into a restore journal.

12. Click Finish.

13. In the Confirm window, review the settings, enter a task name, and then click Apply.