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# Delete 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.

## Prerequisites

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

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

## About this task

Deleting SRDF pairs cancels the dynamic SRDF pairing by removing the pairing information from the storage system and converting the volumes from SRDF to regular volumes. This operation can be performed on a storage group, a SRDF/Metro, or a device group.

To delete SRDF pairs from the SRDF List Volumes View, see Delete SRDF pairs from the SRDF list volumes view.

Half deleting SRDF pairs cancels the dynamic SRDF pairing information for one side (R1s or R2s) of the specified volume pairs and converts the volumes from SRDF to regular volumes. This operation can only be performed on a device group.

If you select all pairs for a delete pair action, the option to remove the devices from the device group, or the local or remote Storage Group is not displayed, as it renders the device group, storage group, or SRDF/Metro unmanageable.

Before you begin:

You are not able to perform SRDF/Metro control actions at the storage group 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 procedure supports the deletion of SRDF pairs from a SRDF/Metro group.

To delete SRDF pairs:

## Steps

1. Select the storage system.
2. Select Data Protection > SRDF.
3. Click Storage Groups, Device Groups, or SRDF/Metro.
4. Do the following, depending on whether you want to perform the operation at the group level or pair level:
   - Group level:
     - Select a group, click , and select Delete Pair. 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 the Half Delete option if deleting one side of the volume pair.
     - Optional: Select Remove from local Storage Groups, Remove from remote Storage Groups, and Remove from local Storage Groups if the pair deletion results in devices that are no longer SRDF protected, and results in the related device groups becoming invalid.
     - Only one side of the SRDF device pairs that are removed 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.
     - Click Advanced Options. Select the advanced SRDF session options and click OK.
     - 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.
   - Pair level:
     - Select a group and click .
     - Select one or more pairs and click Delete Pair.
     - Select the Use 2nd Hop option if including the second hop of a cascaded SRDF configuration (only applicable for device groups).
     - Select the Half Delete option if deleting one side of the volume pair.
     - Optional: Clear the selected (by default) Remove from local Storage Groups, Remove from remote Storage Groups, and Remove from Device Groups check boxes. If you clear the selected defaults, you are warned if the pair deletion results in devices that are no longer SRDF protected, and results in the related device groups becoming invalid. This option is not displayed if all pairs are selected.
     - Click Advanced Options . Select the advanced SRDF session options and click OK.
     - 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.