Using the "Go > Connect to Server" method to mount Volumes
The IP address and fully qualified hostname works
But using the hostname (servername) fails
If the Fully Qualified Hostname (FQHN) works but the hostname fails, the following steps can be taken to corrrect the problem.
Open System Preferences > Network
Under Search Domains, add your domain name
This will allow you to use the hostname instead of having to enter the fully qualified hostname.
Note: You can also use the Network Utility to troubleshoot DNS issues.
Ping: hostname, FQHN, IP Address
Lookup: hostname, FQHN, IP Address