What is this Cellera? Some sort of NAS?

If I understand your question correctly, you're looking for some API to interrogate the thing about its state. You'd better start with the official documentation. It has to have a SNMP management interface. If you can't find anything, you may take the hackish path: most of these things have a Web interface intended to be used by humans. You can drive that interface with Perl and LWP.