NEC Storage Manager IS016-5E Manuale Utente
Chapter 1 Installation Procedure
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Normally, in a system without clusters, one volume cannot be connected to more than one server to
prevent data inconsistency due to file update from servers.
To prevent erroneous updates to this volume or erroneous changes to disk configuration on the business
servers, the RV must be separated using Access Control, etc. from the business server that uses the MV.
Furthermore, the MV must be separated from the business server that uses the RV, in the same way.
To prevent errors in control volume operation, the control volume must be connected only to a specific
server by using Access Control etc., so that it is not operated or updated from another server.
Before introducing servers, you must determine the server connection modes and design Access Control
settings. Access Control can be set for individual Ports or WWNs. Setting for Access Control
requires purchasing the AccessControl.
Figure 1-5 shows an example of Access Control setting for individual Ports.
Figure 1-5 Connection Example in Cluster Configuration
2000 Series
Access
Control
Control
Access
Control
Control
Business Server
(Operated primarily)
Business Server
(Evaluation, Backup)
MV
RV
MV
Dir No.0
Port No.1
Port No.1
Dir No.0
Port No.0
Port No.0
Dir No.1
Port No.0
Port No.0
Access
Control
Control
Business Server
(Standby)
Switch
Switch
Dir No.1
Port No.1
Port No.1