- 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
Adaptive copy disk
In adaptive copy disk mode, write requests accumulate on the R1 device (not in cache). A background process sends the outstanding write requests to the corresponding R2 device. The background copy process scheduled to send I/Os from the R1 to the R2 devices can be deferred if:
- The write requests exceed the maximum R2 write pending limits, or
- The write requests exceed 50 percent of the primary or secondary array write pending space.
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