Changing remote replica options

You can specify the following options that affect the TC system. These options can be set at any time (before or after the initial copy).

• The number of volumes that are copied concurrently during the initial copy. Find related information in the section on priority for initial copy in the Hitachi TrueCopy® User Guide.

• The amount of time the system monitors for blocked paths.

• The amount of time the system monitors for path-watch related SIMs.

To set or change TrueCopy options

1. In Hitachi Command Suite:

1. On the Resources tab, expand the Storage Systems tree, right-click the target storage system and click Replication Dashboard.

In Device Manager - Storage Navigator

1. Click Storage Systems, and then expand the Storage Systems tree.

2. In the Storage Systems tree, click Replication.

2. In the Replication window, click Edit Options > Remote Replication.

3. In the Edit Remote Replica Options window, for Copy Type, select TC.

4. Change Storage System Options as needed. Settings apply to the storage system.

1. For Maximum Initial Copy Activities, specify the number of volumes to be copied concurrently per initial copy operation. The range is from 1 to 512 volumes; 64 is the default. Note the following:

- This setting may impact performance on the primary system. This depends on the number you specify and the amount of I/O activity. The default may or may not limit the impact on performance, depending on your number of data paths, pairs, and so on. You should consider these factors when making a selection.

- When you create or resynchronize a greater number of pairs than you specify in Maximum Initial Copy Activities, the system processes the specified maximum number, and starts additional pairs after one of the specified number is synchronized.

For example, if you specify 70 for Maximum Initial Copy Activities and then create 75 pairs, the system starts the first 70 pairs but does not start the 71st pair until one of the pairs is synchronized.

2. For Path Blockade Watch, enter the number of seconds for the system to monitor blocked paths. The range is from 2 to 45 seconds; 40 is the default.

If all paths become monitored because of path error, an MIH may occur in the host. Therefore, the time you specify must be less than the host's MIH timer setting.

3. For Path Blockade SIM Watch, enter the number of seconds for the system to monitor SIMs reported for blocked paths. The range is from 2 to 100 seconds.

4. For Services SIM of Remote Copy, specify whether or not services SIMs in the remote CU are reported to the host.

5. Change CU Options as needed. Settings apply to the CU only.

1. Select the CU with the options to be changed, then click Change CU Options. If you do not want to change CU options, click Finish.

2. In the Change CU Options dialog box, for Maximum Initial Copy Activities, specify the number of volumes to be copied concurrently per initial copy operation for the CU. The range is from 1 to 16 volumes.

This option is available only when Maximum Initial Copy Activities is Enable.

3. For Services SIM of Remote Copy, specify whether or not services SIMs in the remote CU are reported to the host.

4. Click OK.

6. In the Edit Remote Replica Options window, click Finish.

7. In the Confirm window, review the settings and enter a task name in the Task Name box.

8. Click Apply to save your settings in the system.

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