82 Monitoring PowerVault NX3500Clients that use NFS are stateless and are not affected during fail-back.Clients that use connection-based protocols (CIFS), may be disconnectedduring fail-back. To optimize the fail-back operation, the system provides youwith the following policies for migration on recovery, which affect the load-balance and disconnections:• Migrate Immediately—Always keep the system well balanced, at the costof possibly disconnecting CIFS clients during work time.• Migrate Automatically— Always keep the system well balanced if thecontroller failure is very short, at the cost of disconnecting CIFS clients.This option causes the system to remain unbalanced for a period of severaldays, if the failure remains for long time.This mode overcomes short controller failures because clients have notcreated new material during the short time failure. Therefore, the bestpractice is to rebalance them as soon as possible.If the failure is longer than 10 minutes, the system remains unbalanceduntil you rebalance it manually.• Migrate Manually— Never migrates clients automatically. This requiresmanual intervention to rebalance the system.If the system requires manual intervention to rebalance it after fail-over,the system sends an appropriate email message to the administrator.You can configure the fail-back policy, as described above, per protocol andLAN or client network.CIFS ConnectionsThe CIFS Connections page enables you to monitor current CIFSconnections. To manage CIFS connections, choose MonitorLoadBalancingCIFS Connections. The CIFS Connection page is displayed.
