Notes On Use Of Nec Storage Dynamicdatareplication - NEC NF2300-SR412E User Manual

16.

Notes on Use of NEC Storage DynamicDataReplication

The following explains notes (state transition) if the event below occurs while Dynamic
Data Replication is used:
– A controller is replaced
– The holding of cache memory data by the battery backup unit in power-off state
exceeds the specified time.
Activity State
Separate
Replicate
Restore
Any pair in which a fault has occurred is recovered by the following operation:
1. Issues Forced Separate in the RV target.
Executes the commands in the previous state again (Replicate → Separate or
2.
Restore).
The copy operation started again for the entire logic.
Sync State
Separated Entire difference. No status change
Sep-SYNCING Change to fault state and abort of copy operation
Rep-SYNCING Entire difference. Replication retried automatically from
the first step. No status change
SYNCED
Res-SYNCING Change to fault state and abort of copy operation
SYNCED
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Pairing state