Dell PowerVault MD3000 - Manual (Page 111)

Troubleshooting 111
b Make sure that the network can access the host by using the ping
command in the following syntax:
ping <host-name-or-IP-address-of-the-host>.
If the network can access the host, continue to step c. If the network
cannot access the host, skip to step d.
c Remove the host with the unresponsive status from the MD Storage
Manager, and add that host again.
If the host returns to optimal status, you have completed this
procedure.
d Make sure that the power to the host is turned on and that the host is
operational.
e If applicable, make sure that the host bus adapters have been installed
in the host.
f Examine all external cables and switches or hubs to make sure that
you cannot see any damage and that they are tightly connected.
g If you have recently replaced or added the controller, restart the host-
agent software so that the new controller is found.
If a problem exists, make the appropriate modifications to the host.
4 If you have an out-of-band storage array, use the following procedure. Click
Refresh after each step to make sure of the results:
a Make sure that the network can access the controllers by using the
ping command. Use the following syntax:
ping <controller-IP-address>.
If the network can access the controllers, continue to step b. If the
network cannot access the controllers, skip to step c.
b Remove the storage array with the unresponsive status from the MD
Storage Manager, and add that storage array again.
If the storage array returns to optimal status, you have completed this
procedure.
c Examine the ethernet cables to make sure that you cannot see any
damage and that they are tightly connected.