Skip to main content

What do I need to know before creating a mirrored pair?

Before creating a mirrored pair, follow these guidelines.

  • You must have two storage arrays.
  • Each storage array must have two controllers.
  • The two storage arrays must be discovered in SAN Manager .
  • Each controller in both the primary array and secondary array must have an Ethernet management port configured and must be connected to your network.
  • The storage arrays have a minimum firmware version of 11.50. (They can each run different OS versions.) Mirroring setup is different when using SAN Manager 4.1 and earlier versus 4.2 and later, as well as System Manager 11.60.1 and earlier vs 11.60.2 and later.

    • If your controllers are using System Manager 11.50–11.60.1, select the initiator array and click Launch to open the browser-based System Manager and configure mirroring from there.

    • If your controllers are using System Manager 11.60.2 or later, mirroring configuration is performed entirely from SAN Manager 4.2 or later.

  • You must know the password for the local and remote storage arrays.
  • You must have enough free capacity on the remote storage array to create a secondary volume equal to or greater than the primary volume that you want to mirror.
  • Asynchronous mirroring is supported on controllers with Fibre Channel (FC) or iSCSI host ports, while synchronous mirroring is supported only on controllers with FC host ports.
  • In a VMWare environment, DE6000 systems must be mirrored with other DE6000 systems. DE2000 and DE4000 systems can be mirrored with DE2000 or DE4000 systems. DE6000 systems do not support mirroring with DE2000 or DE4000 systems in a VMWare environment.

    • This applies to both asynchronous and synchronous mirroring.

    • No such limitations exist in other host OS environments.