Force mounting an external disk that is not recognized

I recently bought a 4 TB naked (no enclosure) external hard drive that I mount via a Newer Tech dock (the ones where you insert the naked drive like bread in a toaster) and is connected to my MacBook pro via FireWire 800. About a month later I wanted to use the drive and it would not mount. Disk Utility reports that it is "Not Mounted". When I connect the drive I get this: > The disk you inserted was not readable by this computer. So I tried terminal commands like: diskutil list which yelds this: I also tried: mount force /dev/disk3 and got: mount: You must specify a filesystem type with -t. and then: mount force -t Apple_HFS /dev/disk3 which outputs: usage: mount [-dfruvw] [-o options] [-t external_type] special node mount [-adfruvw] [-t external_type] mount [-dfruvw] special | node I also tried: diskutil repairVolume /dev/disk3 which gives back: Error starting file system repair for disk3: Unrecognized file system (-69846) and finally: sudo gpt -r show /dev/disk3 which returns: I am at a loss, can anyone give me some advice on how to mount this drive?