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Chapter 4 Functions of ReplicationControl
107
AccessControl
Business Server Backup Server
ReplicationControl ReplicationControl
Volume List Volume List
MV
MV
RV
RV
FC Connection FC Connection
Figure 4-1 Direct Operation to MV or RV Volumes
y A volume (control volume) is prepared to issue an I/O to a disk array, and operation is performed
through the control volume.
Since operation is performed through the control volume, a business server or a backup server can
operate MV or RV even though those servers cannot access MV or RV directly. Depending on the
Access Control setting of the disk array, however, operation can be performed only to the logical disk
permitted to access the server or the logical disk that pairs with a logical disk permitted to access the
server.
Select a logical disk for each disk array from logical disks connected to each server as a control
volume, and define it as the volume used to issue an I/O to a disk array beforehand to register it in the
volume list.
Defining a control volume in the volume list in advance eliminates the need for considering the
existence of a control volume during operation. If a control volume has been defined, an I/O is
issued to a disk array using the control volume automatically.
For details on the definition of a control volume, refer to the “Data Replication User’s Manual
(Installation and Operation Guide for Windows)” of systems to be used.
The business server to which MV is connected can operate MV directly, and no control volume is
needed normally. The backup server to which RV is connected can perform operations, such as
replication or separation, if a control volume is prepared.