[Paul Huppe] “Can I use my current MacPro 5,1 as a drive bay for the new one? How would I need to configure it to do so and would I be able to get max speed out of it this way?”
There just isn’t a good way to do this. You can either run it as a file server over the network, and doing that in any meaningful way would mean spending a pile of money on a 10GbE card (to run on the outdated OS), or you could try some kind of unreliable case mod. Either way, the internals on the 5,1 are old and slow by today’s standards. Target Disk Mode would only allow access to the boot drive, and only over FireWIre 800, and fans run full the whole time.
It’s just not worth it for what you’d end up with. Better long-term to go RAID, either internal or TB3. Or USB 3 NVMe SSDs. They’re quick!
EDIT: Sam’s Pegasus suggestion is an internal option, not an external box.
Doug Metz
Dalton Agency