Technical data

254 Chapter 8 Troubleshooting
8.5 Determining the Failure of the Network Side in the NAS System
When a failure occurs in the LAN environment between the host computer and the NAS
Modular subsystem, or the NAS Modular subsystem, determine whether there is a failure in
the NAS Modular subsystem according to the following flow.
Start the NAS OS.
Is the READY LED of the NAS Unit lit?
Yes
No
START
Yes
No
Was the failure recovered?
END
Check the following for the host
computer, and if there is any problem,
take action for it.
• Are the IP addresses, subnet masks
and MTU values appropriate for the
LAN environment?
(The MTU value needs to be the
same value in all PCs, Switches and
NAS Units in the LAN environment.)
• Is the LAN port linked up?
Yes
No
Was the failure recovered?
END
Is there any response of the ping
from the host computer to the
optional PC or the router, etc.
connected through the LAN?
Yes
No
Take action for the connection with the
problem.
Yes
No
Yes
No
Was the failure recovered?
END
Is the LAN between the host
computer and the NAS Unit firmly
connected from the following view
points?
• Connection of LAN cables
• Power supply status of the
network peripheral devices
including Switches, etc.
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