Dell PowerVault MD3000i User's Guide - Page 112
support.dell.com, The type of management operations being done and the number
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d Make sure that the applicable network configuration tasks have been done (for example, the IP addresses have been assigned to each controller). 5 Make sure that the controller firmware is compatible with the MD Storage Manager on your management station. If the controller firmware was upgraded, the MD Storage Manager might not have access to the storage array. A new version of MD Storage Manager might be needed to manage the storage array with the new version of the controller firmware. If this problem exists, see the Dell support website at support.dell.com. 6 Look to see if there is too much network traffic to one or more controllers. This problem corrects itself because the MD Storage Manager tries to reestablish communication with the controllers in the storage array at regular times. If the storage array was unresponsive and a subsequent try to connect to the storage array succeeds, the storage array becomes responsive. 7 For an out-of-band storage array, look to see if management operations are taking place on the storage array from other storage management stations. The type of management operations being done and the number of management sessions taking place together establish the number of TCP/IP connections made to a controller. When the maximum number of TCP/IP connections have been made, the controller stops responding. This problem corrects itself because after some TCP/IP connections complete, the controller then becomes responsive to other connection tries. 8 If the storage array is still unresponsive, problems might exist with the controllers. If these problems exist, see the Dell support website at support.dell.com. 112 Troubleshooting