@softraid-support It certainly seems a strange mix of results. The only Thunderbolt cables I have are the two that came with the two Thunderbays as I...

@softraid-support Yeah I've been using those same settings (5K video, RGBA codec, 16GB file size) for every test just to make sure they're consiste...

@softraid-support I just tried various combinations of disks and basically now regardless of positions they've all down to 150-160MB/s R+W. Nothing i...

@softraid-support Thanks, I really hope this turns out to be a resolvable issue as the only other drive options when I was putting this build together...

@softraid-support Thanks. I thought the Ultrastar drives sounded the best of the options I looked at too and I didn't see anything specification-wi...

@softraid-support It's two Thunderbay 4 units.

@softraid-support That broke my heart a little to delete the volume after spending all yesterday transferring stuff over to it! But better to get t...

@softraid-support Oh dear this isn't looking good then! Thanks for getting back to me. That was the best result I got and I had to reboot to ge...

@softraid-support Thanks again for your help, this has helped me finalise the project. I've ordered the Ultrastar 8TB drives so they should be here...

@softraid-support Thanks, I followed up with the EU OWC but as the UK is outside of the EU it would be unpredictable for tax and import duties to buy ...

@softraid-support Thanks for the fast reply, this has certainly given me some extra factors to consider and altered the equation a little. You're rig...