I'm not surprised by that outcome - but just to reiterate: the latest release of XUB works fine with the original IBM BIOS if you use a 16-bit IDE card, correct?
Yes correct, My 5162 is working well with the Original IBM 5162 BIOS, XUB R602 and 16-bit IDE / Floppy controller, I'll be keeping the Original IBM Bios in from now on. I have not tested the same in my 5170 as it currently has a dead PSU. It's a bit of a puzzler as when i tested way back i got the Errors and corruption, The only thing i can think of that changed since then and now is the XUB revision.