Adding remote connections

TrueCopy® User Guide
Version
9.8.5
Audience
anonymous
Part Number
MK-98RD9022-16

You can configure the storage systems for TrueCopy by adding a remote connection from the primary to the secondary system.

Adding the connection and setting up remote paths prepares the systems for TC commands and operations.

Depending on the system configuration, remote connection from the secondary storage system to the primary storage system is also added. For VSP Gx00 models, VSP Fx00 models, and VSP E series, perform this procedure in the primary storage system.

CAUTION:

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.

  • The local and remote systems must be ready for TC operations. See Storage system preparation.
  • The data path must be set up. See Data path requirements and configurations.
  • (VSP 5000 series) The port attributes on the local and remote systems must be configured for TrueCopy. See Defining port attributes (VSP 5000 series).
  • The remote 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 Round trip time option.
  • Another field, Minimum Number of Paths, is also covered in more detail in Minimum number of remote paths option.
  • 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.
  • Operations involving remote paths cannot be performed when changing the firmware. Make sure a firmware change completes before beginning operations involving remote paths. You can perform operations involving remote paths from CCI even while changing the firmware.
  • 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.
  • Operations involving remote paths cannot be performed if changing the microcode or firmware is interrupted due to an error or operation cancellation. Make sure a microcode or firmware change completes before beginning operations involving remote paths. You can perform operations involving remote paths from CCI even when a microcode or firmware change is not complete.
In a configuration where the following storage systems are connected with each other, you cannot perform operations involving remote paths from Device Manager - Storage Navigator on VSP 5000 series. Perform operations involving remote paths from CCI.
  • VSP 5000 series (all microcode versions) and VSP E1090
In a configuration where VSP E590 or VSP E790 is connected to either of the following storage systems, you cannot perform operations involving remote paths from Device Manager - Storage Navigator on a storage system other than VSP E590 and VSP E790. Perform operations involving remote paths from CCI.
  • VSP G/F350, G/F370, G/F700, G/F900: Earlier than 88-08-01-xx/xx
  • VSP E990: Earlier than 93-04-01-xx/xx
  1. Click Storage Systems, and then expand the Storage Systems tree.
  2. In the Storage Systems tree, click Replication > Remote Connections.
  3. In the Remote Connections window, click the Connections (To) tab.
  4. In the Connections (To) tab, click Add Remote Connection.
  5. (VSP 5000 series) In the Add Remote Connection window, select the Connection Type:
    • For TC, select System (connects system by system).
    • For TCz, select CU (connects CU by CU).
    Note: 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.
  6. In the Remote Storage System box, specify the following:
    1. For Model, select the storage system model and number. Select 8 for VSP 5000 series, 7 for VSP G1x00, VSP F1500, 19 for HUS VM, and 18 for VSP E series, VSP Gx00 models and VSP Fx00 models, and 6 for VSP.
      HUS VM (19) and VSP E series, VSP Gx00 models and VSP Fx00 models (18) can be selected only when System is selected for Connection Type.
    2. For Serial Number, enter one of the following remote storage system serial numbers.
      - VSP 5100 and VSP 5500: 1 to 99999 (5 digits)

      - VSP G1x00, and VSP F1500: 1 to 99999 (5 digits)

      - VSP: 1 to 99999 (5 digits)

      - VSP E series, VSP Gx00 models, and VSP Fx00 models: 400001 to 499999 (6 digits)

      VSP E590, VSP E790: 600001 to 699999 (6 digits)

      - HUS VM: 200001 to 265535 (6 digits)

      Note:
      • When using virtual storage machine volumes, make sure to specify the serial number of the physical storage system, not the serial number of the virtual storage machine.
      • When the remote storage system is VSP 5000 series, specify 5 + serial number (6 digits in total) in CCI, or specify the serial number only (5 digits in total) in Device Manager - Storage Navigator.
      • When the remote storage system is VSP G1x00 or VSP F1500, specify 3 + serial number (6 digits in total) in CCI, or specify the serial number only (5 digits in total) in Device Manager - Storage Navigator.
  7. 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 remote storage and local storage system. If the number of paths drops below the minimum, the local storage system splits the pair.
      The range is 1-8, and the default is 1.
    3. In the path ports boxes, select the ports used by the remote path.
      You can add more remote paths by clicking the Add Path button. See Configuring additional remote paths for more information.
      Note: Set 1 for Minimum Number of Paths if the local storage system has a TrueCopy pair that contains critical data for disaster recovery. By setting 1, you can continue TrueCopy operation even when there is only one path to the remote storage system.

      To maintain high performance operation in the local storage system, set 2 or a greater value (8 as the maximum number of paths for a path group) for Minimum Number of Paths.

      If the number of paths goes below the minimum number of paths and the TrueCopy pair is split, deciding whether to fence the P-VOL of the pair (to reject all write I/Os) is determined according to the primary volume fence level.

  8. In Select Type, select the port type.
  9. Select the port to use for the local storage system and the remote storage system. If you selected iSCSI for the port type, enter the IP address and the TCP port number for the port of the remote storage system. To add a path, click Add Path. If necessary, you can add a path later in the Add Remote Paths window.
  10. 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.
      The range is 10-100 seconds, and the default is 15. RIO MIH (remote I/O missing interrupt handler) time is the waiting time from when copy starts until when it ends. This value applies to the slots which received the request of copying data between storage systems.
    2. For Round Trip Time, enter a time limit for data copy from P-VOL to S-VOL in ms. The range is 1-500 ms, and the default is 1.
  11. Click Finish.
  12. In the Confirm window, review the settings and enter a task name in the Task Name box.
  13. Click Apply to save your settings.

    If you selected Go to tasks window for status, the Tasks window is displayed.

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