Connection using firewire 800 to external sata 2tb drive (using thunderbolt dongle) - the drive suddenly appears unformatted. I connect my drive which i've been using for weeks - suddenly this: "the disc you inserted was not readable by this computer - Initilize/Ignore/Eject"
Of course I choose 'ignore'. It's happened to me 3 times now. 2 times on my brand new imac (Processor 3.4 GHz Intel Core i7) and 1 time on the same spec iMac I have at the office which was actually a 4tb sata drive.
This is the 3rd drive which is now completely in accessable to to me. When I run any form of disc recovery, the content is there - but the MAC OS believes it's a fresh drive and will not mount it! It shows in disc utility as a blank unformatted drive.
What is going on??? I can't keep loosing my data. How can a drive suddenly loose all it's intergral data/why is this happening. I am scared to connect any of my other back up sata drives should the mac os be corrupting them in some way. This is critical.
Apple please sort this out. Is it due to firewire 800 step down using the thunderbolt dongle?
Frustrated Apple user (again!).