Suspend SRDF pairs

Symmetrix Remote Data Facility (SRDF) facilitates the data replication from one storage system to another through a storage area network or Internet Protocol (IP) network.

About this task

This procedure explains how to stop data transfer between SRDF pairs.

Before you begin:

See Roles and associated permissions to determine the user roles that can perform this task.

You are not able to perform SRDF/Metro control actions at the SG level on the SRDF/Metro pairs in a standard SRDF view. You are not allowed to perform standard SRDF actions on the SRDF/Metro leg in a standard SRDF view. If you are viewing a storage system that is not associated with either side of the pair of interest, you must go to the view of the relevant storage system.

This operation is blocked on SRDF groups that Global Mirror uses.

This operation can be invoked from multiple locations in the Unisphere user interface (Device group > SRDF Group, Device Group > SRDF Pairs, SG All Details > SRDF tab, Protection dashboard) . Depending on where the operation is invoked, some of the steps below may not apply.

To suspend SRDF pairs:

Steps

  1. Select the storage system.
  2. Click Protection to view the Protection dashboard and select SRDF from the Protected Storage Groups section of the summary panel.
  3. Do the following, depending on whether you want to perform the operation at the group level or pair level:
    • Group level:
      • Select a group and click Suspend. For storage groups with Celerra FBA emulation, a warning dialog is displayed indicating that the storage group may be managed externally using eNAS. To continue, click OK, otherwise click Cancel.
      • Select the Use 2nd Hop option if including the second hop of a cascaded SRDF configuration (not applicable if the hop2 is SRDF/Metro).
      • Select Use Immediate or Use Consistency Exempt.
      • Click Move Bias to move the Bias from one side to the other (only applicable for SRDF/Metro). The side with the Bias set is the side that the host can see after the suspend action completes. This option is not allowed until all the devices in the SRDF/Metro config, both new and existing, are in the ActiveActive or ActiveBias SRDF pair state.
    • Pair level:
      • Select a group, click An icon showing the letter i, and click the number next to SRDF Pairs.
      • Select one or more pairs and click Suspend.
      • Select the Use 2nd Hop option if including the second hop of a cascaded SRDF configuration (not applicable if the hop2 is SRDF/Metro).
      • Select Use Immediate or Use Consistency Exempt.
      • Click Move Bias to move the Bias from one side to the other (only applicable for SRDF/Metro). The side with the Bias set is the side that the host can see after the suspend action completes. This option is not allowed until all the devices in the SRDF/Metro config, both new and existing, are in the ActiveActive or ActiveBias SRDF pair state.
      • Only one side of the SRDF device pairs that are suspended from the SRDF/Metro session remains host-accessible when the operation completes. The Keep R1 or Keep R2 option is used to specify the side that should remain host-accessible (applies to storage systems running PowerMaxOS 5978 only).
  4. Click Advanced Options to set the advanced options. Select the advanced options and click OK.
  5. Do one of the following:
    • Click Run Now to perform the operation now.
    • Expand Run Now and click Add to Job List to add this task to the job list, from which you can schedule or run the task at your convenience. For more information, see Schedule jobs and Preview jobs.