Hi Colin,
Thanks for your post. Your G-SPEED eS can be used with a Thunderbolt adapter as long as the HBA card is Thunderbolt-aware. As it turns out, the RAID card that shipped with your G-SPEED eS is the RocketRaid 2314, which is NOT Thunderbolt-aware. You could use a card such as the 644L, which is TB-aware, and as it is a Highpoint product, the RAIDset should be compatible. This way you could leave the 2314 card in your current MacPro, install the 644L in a Thunderbolt expansion chassis to use with your RAID5 array, and you would be able to move the RAID between the two systems. Please let me know if you have any questions.
Regards,
Gene Gilbert
g-technology.com