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Chapter 3 Replication Management
48
[Execution Conditions]
To Pair setting or Unpair, the following conditions must be satisfied.
Conditions for Pair setting
Volumes in which the pair setting is performed must satisfy the following conditions.
(i) The volume capacities of MV and RV match.
(ii) The specified RV is not set as RV for another pair.
(iii) If the specified MV is set as MV for another pair, the maximum number of simultaneous pairs is
not exceeded.
(iv) The volume formats match.
(v) The pair hierarchy does not form any loop.
(vi) When MV and RV exist in the same disk array and if RV is used to set another pair, a volume in
another disk array is specified.
(vii) The disk array where the specified MV and RV are stored is monitored.
(viii) The disk array where the specified MV and RV are stored is not in the Freeze state.
(ix) If the specified MV is registered in the AT-group, the MV and the specified RV are set as a DDR
pair.
(x) A volume having snapshot attributes other than BV is not set as MV.
(xi) A volume having snapshot attributes is not set as RV.
Do not execute Pair Setting for a reserved volume of the business server or for a volume specified as
a performance optimization work disk. The replication screen does not display the Volume List.
Conditions for Unpair
Volumes for unpair must satisfy the following conditions.
(i) The specified MV and RV are paired.
(ii) The specified MV and RV are in the Separated state.
(iii) The disk array where the specified MV and RV are stored is monitored.
(iv) The disk array where the specified MV and RV are stored is not in the Freeze state.
(v) The specified MV is not registered in the AT-group.