Adding remote connections

You configure the storage systems for TrueCopy by adding a remote connection from the primary system to the secondary system. Adding the connection and setting up remote paths prepares the systems for TC commands and operations.

 Do not add or delete a remote connection or add a remote path at the same time that the SCSI path definition function is in use.

Prerequisite information

• This procedure is performed on the primary system.

• The data path must be set up. See the section on data path requirements and configurations in the TrueCopy User Guide.

• The secondary system serial number, LDKC, controller ID, path group ID, and port numbers are required.

• One of the fields, Round Trip Time, is covered extensively in the planning section on round trip time in the TrueCopy User Guide.

• Another field, Minimum Number of Paths, is also covered in more detail in the planning section on minimum number of remote paths in the TrueCopy User Guide.

• Remote path settings are required to perform TC pair operations and check pair status in Device Manager - Storage Navigator. Make sure to complete the procedure. If you cancel remote path settings, you will be unable to perform operations and check status.

Also, operations involving remote paths cannot be performed when changing the firmware. Make sure a firmware change completes before beginning operations involving remote paths.

• When using virtual storage machine volumes, make sure to specify the physical serial number of the storage system, not the serial number of the virtual storage machine.

Procedure

1. Open the Remote Connections window.

In Command Suite:

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

2. Right-click the target storage system, and click Remote Connections.

In Device Manager - Storage Navigator:

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

2. In the Storage Systems tree, click Replication > Remote Connections.

2. In the Remote Connections window, click Connections (To) tab.

3. In the Connections (To) tab, click Add Remote Connection.

4. In the Remote Storage System box, specify the following:

1. For Model, select the storage system model.

2. For Serial Number, select the serial number.

 When using virtual storage machine volumes, make sure to specify the physical serial number of the storage system, not the serial number of the virtual storage machine.

5. In the Remote Paths box, specify the following:

1. For Path Group ID, select the path group ID (00-FF). A storage system can have a maximum of 64 registered path group IDs.

2. For Minimum Number of Paths, select the minimum number of paths between the secondary and primary system. If the number of paths drops below the minimum, the primary system splits the pair.

The maximum is 8; the default is 1.

3. For Select Type, select the port type, and then select the port to be used for both the local storage system and the remote storage system. If you select iSCSI, enter the IP address and the TCP port number for the remote storage system port. You can add more paths by clicking the Add Path button. You can also add and delete paths in the Add Remote Paths window if necessary.

6. Click Options to access additional settings, which are optional.

1. For RIO MIH Time, enter an interval in seconds that, if exceeded, causes the data-transfer operation to be reported as failed by the system. Values range from 10 seconds to 100 seconds; 15 is the default. RIO MIH means "remote I/O missing interrupt handler".

2. For Round Trip Time, enter a time limit for data copy from P-VOL to S-VOL. Range is 1-500 milliseconds.

7. Click Finish.

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

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