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# View SRDF protected device groups

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

The SRDF dashboard provides you with a single place to monitor and manage SRDF sessions on a storage system, including device groups types R1, R2, and R21. See Manage remote replication sessions for additional information.

Before you begin:

The following configurations are not supported:

- An R21 or R22 SRDF device that is associated with a system running HYPERMAX OS 5977.
- A cascaded SRDF configuration that contains a system running HYPERMAX OS 5977.
- A concurrent R22 configuration that contains a system running HYPERMAX OS 5977.

To access the SRDF dashboard:

## Steps

1. Select the storage system.
2. Select Data Protection > Device Groups.
3. Click SRDF .

   The following properties display:

   - Device Group—device group name
   - Standard—Number of standard volumes
   - BCV—Number of BCV volumes
   - State—Current state of device group
   - Group Type—device group type
   - Group Valid—Indicates if the group is valid or invalid for SRDF management.

   The following controls are available:

   - Establish— Establish SRDF pairs
   - Split— Split SRDF pairs
   - Suspend— Suspend SRDF pairs
   - Restore— Restore SRDF pairs
   - Resume— Resume SRDF links
   - Failover— Failover
   - Failback— Failback
   - Swap— Swap SRDF personalities
   - Set SRDF/A— Set SRDF/A controls to prevent cache overflow
   - Set Consistency— Set consistency protection
   - Move— Move SRDF pairs
   - Invalidate— Invalidate R1 or R2 volumes
   - Ready— Make R1 or R2 volumes ready
   - Not Ready— Make R1 or R2 volumes not ready
   - R1 Update— Update R1 volumes
   - RW Enable — Read or Write Enable R1 or R2 Volumes
   - Write Disable— Read or Write disable R1 or R2 volumes
   - RW Disable R2s— Read or Write disable R2 volumes
   - Refresh— Refresh R1 or R2 volumes
   - Set Mode— Set SRDF mode
   - Delete Pair— Delete SRDF pairs