WTB: HP 9133/9134/9135A, HDD, also non-working

[Michael Fehlhammer]

That sounds interesting. But I already tried out a ST 412 (10 MB) which is working in a 9134B. I thought it to be the closest sister of the 506. But I only received "ERROR DISC" when I tried to INITIALIZE it in my 9135A.
Maybe the controller in the oldest drives (9135A) are less flexible as the controllers in the more modern 9133 D/H/L drives?