Doug,
Run ZRQCH0 under XXDP(+?) to format the RD's.  If your 11/83 has a serial
line at 176500/300 you can even load XXDP from a PC emulating a TU58. I
routinely do this.
Wim
----------
  From: Doug Carman <pdp11(a)bellsouth.net>
 To: classiccmp(a)classiccmp.org
 Subject: RD53 formatter
 Date: Thursday, July 05, 2001 2:52 PM
 I have a PDP-11/83 with an RQDX3 disk controller and a pair of RD53
 drives from a MicroVAX II.  Since all I can get from both drives are I/O
 errors, I am left to assume that they were once hooked to an RQDX2
 controller and now need to be re-low-level formatted to work with the
 RQDX3.  Does anyone know what is required to do this on an 11/83?  Was
 there an XXDP diagnostic program that did this?
 Thanks.
 --
 Doug Carman
 pdp11(a)bellsouth.net