I have a G-Dock ev, that holds two 1TB G/drives. It has two thunderbolt ports but no external USB port. While there is power to the dock, evidenced by the lights on both drives being illuminated. It will not longer mount the drives. I also do not see the drives listed when I use the view all option in Disk Utility. I have reset both the NVRAM/PRAM and the SMC and still no luck.
These hold all of my photography images. Any suggestions would be appreciated.
A further update. I ejected one of the drives from the G-Dock and put it into the G/ev All Terrain Case I own. It connects via a USB to the computer. The drive connected fine and all of the data was accessible.
So, I assume the problem lies in either the thunderbolt cable or in the thunderbolt connections on either the dock or my iMac.