- 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
PowerMaxOS or HYPERMAX OS
SRDF/A SSC sessions where both arrays are running PowerMaxOS or HYPERMAX OS have one or more Transmit cycles on the R1 side (multicycle mode).
The following diagram shows multicycle mode:
- Multiple cycles (one capture cycle and multiple transmit cycles) on the R1 side, and
- Two cycles (receive and apply) on the R2 side.
In multicycle mode, each cycle switch creates a new capture cycle (N) and the existing capture cycle (N-1) is added to the queue of cycles (N-1 through N-M cycles) to be transmitted to the R2 side by a separate commit action.
Only the data in the last transmit cycle (N-M) is transferred to the R2 side during a single commit.
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