How to troubleshoot when having error 'No data available' for Disk IO statistics in the Novell server?

How to troubleshoot when having error 'No data available' for Disk IO statistics in the Novell server?

Novell:

Possible Scenario -  I get a "No data available" message for  Disk io statistics while trying to monitor servers.
Solution:
The connection must be established only through TELNET or SSH mode. 
Check whether the below command runs and displays corresponding output in the system.

Command to be executed on the server  =>   LANG=C iostat -d

Sun Solaris: 

Possible Scenario -  I get a "No data available" message for Inode Usage while trying to monitor servers.
Solution:
The connection must be established only through TELNET or SSH mode. 
Check whether the below command runs and displays corresponding output in the system.

Command to be executed on the server =>   iostat -Ix;echo '-----DISK_EXTENDED_STATS-----';iostat -x 1 3

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