Dell PowerVault MD3820f - Manual (Page 236)

11. If there is a cable or network accessibility problem, see step 20, if not step 12.
12. For an in-band managed storage array, make sure that the host is network accessible by using the
ping command to verify that the host can be reached. Type one of these commands, and press
<Enter>.
– ping <host-name>
– ping <RAID controller module-IP-addres>
13. If the verification is successful, see step 14, if not, step 15.
14. Remove the host with the Unresponsive status from the EMW, and select Add Storage Array to add
the host again.
15. If the host does not return to Optimal status, go to step 16.
16. Ensure that the host is turned on and operational and that the host adapters have been installed.
17. Check all external cables and switches or hubs to make sure that no visible damage exists and that
they are securely connected.
18. Make sure the Host Context Agent software is installed and running.
If you started the host system before you were connected to the RAID controller module in the
storage array, the Host Context Agent software will not be able to detect the RAID controller
modules. If this is the case, make sure that the connections are secure, and restart the Host Context
Agent software.
19. If you have recently replaced or added the RAID controller module, restart the Host Context Agent
software so that the new RAID controller module is recognized.
20. If the problem still exists, make the appropriate host modifications, check with other administrators
to see if a firmware upgrade was performed on the RAID controller module from another storage
management station.
If a firmware upgrade was performed, the EMW on your management station may not be able to
locate the new AMW software needed to manage the storage array with the new version of the
firmware.
21. If the problem persists contact your Technical Support representative.
22. Determine if there is an excessive amount of network traffic to one or more RAID controller
modules.
This problem is self-correcting because the EMW software periodically retries to establish
communication with the RAID controller modules in the storage array. If the storage array was
unresponsive and a subsequent attempt to connect to the storage array succeeds, the storage array
becomes responsive.
For an out-of-band managed storage array, determine if management operations are taking place on
the storage array from other storage management stations. A RAID controller module-determined
limit exists to the number of Transmission Control Protocol/Internet Protocol (TCP/IP) connections
that can be made to the RAID controller module before it stops responding to subsequent
connection attempts. The type of management operations being performed and the number of
management sessions taking place together determine the number of TCP/IP connections made to a
RAID controller module. This problem is self-correcting because, after some TCP/IP connections
terminate, the RAID controller module then becomes responsive to other connection attempts.
23. If the storage array is still unresponsive, a problem may exist with the RAID controller modules.
Contact your Technical Support representative.
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