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# View SRDF protected and SRDF/Metro protected storage 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

Unisphere provides SRDF monitoring and management for storage groups, including SRDF/Metro protected storage groups. Only single hop SRDF is supported for SRDF/Metro, that is, current or cascaded setups are not supported. See Manage remote replication sessions for additional information.

## Steps

1. Select the storage system.
2. Click Data Protection to view the Protection dashboard and select SRDF or SRDF/Metro from the Protection section of the summary panel.
   The following properties display, depending on the operating environment:
   - Storage Group—User-defined storage group name
   - States—The state of the storage group - possible values are:
     - ActiveActive
     - ActiveBias
     - Consistent
     - Failed Over
     - Invalid
     - Partitioned
     - R1 Updated
     - R1 Update in progress
     - Suspended
     - Synchronization in progress
     - Synchronized
     - Transmit Idle

   If Unisphere detects an asynchronous state change event for an SRDF group from Solutions Enabler, it updates the Unisphere state for the SRDF group and its related SRDF device groups and SRDF storage groups. The Storage Group list view must be refreshed so that the latest state is reflected.

   - Modes—The SRDF modes
   - SRDF Type—The SRDF type (SGs with volumes having multiple SRDF types display multiples here, for example, R1 and R2).
   - SRDF Groups—The SRDF group number (Concurrent SRDF setups list multiple SRDF group numbers.)
   - Capacity(GB)—Total capacity of the storage group in GB
   - Masking Views—The number of associated masking views
   - Emulation—The emulation type (ALL, FBA, CKD)
   - Bias Location—The bias location
   - Witness Protected—Indicator if witness protected

   Click to view the details.

   A graphic displaying the replication configuration is displayed. It shows the following items:

   - Containers representing the R1 and R2 volumes are displayed. The color of the container indicates the status of the container:
     - Read write enabled
     - Write disabled
     - Connectivity lost
   - An arrow indicating the direction of I/O
   - A central icon and label indicating the state of the replication pair
     - Synchronized, Consistent, ActiveActive, ActiveBias
     - Synchronization in progress
     - Suspended, Split, Failed Over
     - Unknown
     - Partitioned, Transmit Idle

   The following properties are displayed:

   - Storage Group—User-defined storage group name
   - States—Possible values for the state of the storage group are:
     - ActiveActive
     - ActiveBias
     - Consistent
     - Failed Over
     - Invalid
     - Partitioned
     - R1 Updated
     - R1 Update in progress
     - Suspended
     - Synchronization in progress
     - Synchronized
     - Transmit Idle
   - Modes—The SRDF modes
   - Capacity(GB)—Total capacity of the storage group in GB
   - SRDF Groups—The SRDF group number (Concurrent SRDF setups list multiple SRDF group numbers.)
   - SRDF Pairs—Number of associated SRDF pairs
   - Masking Views—The number of associated masking views
   - Emulation—The emulation type (ALL, FBA, CKD)
   - Bias Location—The bias location
   - Group Type—The group type
   - Production Volumes—The number of production volumes
   - Last Updated—The date and time of the last update

   The following controls are available, depending on the operating environment and the mode:

   - 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
   - Move— Move SRDF pairs
   - Delete Pair— Delete SRDF pairs
   - Set Mode— Set SRDF mode
   - Set Bias— Set bias location
   - Set Metro Preference— Set metro preference
   - Convert to MetroDR— Convert a SRDF/Metro with DR configuration into a SRDF/Metro Smart DR configuration
   - Set Volume Attributes > Invalidate— Invalidate R1 or R2 volumes
   - Set Volume Attributes > Ready— Make R1 or R2 volumes ready
   - Set Volume Attributes > Not Ready— Make R1 or R2 volumes not ready
   - Set Volume Attributes > R1 Update— Update R1 volumes
   - Set Volume Attributes > RW Enable — Read or Write Enable R1 or R2 Volumes
   - Set Volume Attributes > Write Disable— Read or Write disable R1 or R2 volumes
   - Set Volume Attributes > RW Disable R2s— Read or Write disable R2 volumes
   - Set Volume Attributes > Refresh— Refresh R1 or R2 volumes
   - Asynchronous > Set SRDF/A— Set SRDF/A controls to prevent cache overflow
   - Asynchronous > Set Consistency— Set consistency protection