Cannot boot up FreeNAS

I've been using a FreeNAS server for the past 6 months and recently, something happened and it's not able to boot up completely now. After attaching a monitor to the server, I've found multiple logs saying "Periph destroyed" pertaining to almost all my disk devices. Not trying to panic but I really don't know what the messages mean. And I can't even drop to the shell to investigate anything so the logs are all I have. I'm using FreeNAS 9.3. My server is a typical Intel PC server. I can't remember specifics about the server build but if anyone thinks it's pertinent information I can dig out my receipts. Appreciate any pointers towards what may the problem be and how to solve it.