- Notes, cautions, and warnings
- Preface
- Introduction
- Disaster recovery
- High availability
- Data migration
- SRDF I/O operations
- SRDF write operations
- SRDF read operations
- SRDF/A resilience and performance features
- Management tools
- More information
Dell SRDF Introduction
R2 device states
An R2 device can have the following states for SRDF operations:
- Ready—The R2 device receives the updates that are propagated across the SRDF links and can accept SRDF host-based software commands.
- Not Ready—The R2 device can receive updates that are propagated from the primary array, but cannot accept SRDF host-based software commands.
- Link blocked (LnkBlk)—Applicable only to R2 SRDF mirrors that belong to R22 devices.
One of the R2 SRDF mirrors cannot receive writes from its associated R1 device. In normal operations, one of the R2 SRDF mirrors of the R22 device is in this state.
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