I did a few more tests with the RK07. As I did not have the correct bulkhead, I made one from a "decommissioned" RL02 drive. The socket to the cable is identical to the one for the RK07. As nothing seemed to work, I guessed that I might have the flatcable between the socket on the "bulkhead" and the RK611 controller (M7904 module) the wrong way around installed. So, I installed the flatcable the other way around on the bulkhead. I get quite different responses now! The command ".INIT DM0:" gives the response "?DUP-F-Error reading bad block replacement table DM0:" but the FAULT light is turned on! When I enter the command ".FORMAT DM0:", the FAULT light goes off, and I get the response as written in my previous post. When I enter "DIR DM0:" the FAULT light is turned on also. On many occasions the system hangs, although that is not apparent nor echo anything I type on the VT100 console terminal anymore. What is even more strange, is that when I repeat (after rebooting) the .INIT command or the .FORMAT command, is that I can see clearly the READY lamp flash off/on, and after a few more attempts, I can hear the movement, and *see* the whole drive "shake" (it still on its wheels and not on the rubber "feet"). I can even see the "A" lamp go on and off a few times, so that shows that the controller accesses the drive. Then the system hangs again. Can I conclude that the cable is now correctly connected from the RK611 controller -> bulkhead -> RK07 drive ? What could explain the symptoms that I see? - what can cause the system non-responsive (RT11 does not catch the error) - why does the execution of the command seems to get a step further every time I run them? thanks, - Henk. ________________________________ Van: cctalk-bounces at classiccmp.org namens Gooijen, Henk Verzonden: zo 22-01-2006 12:53 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: RE: RK07 questions I must make a correction to a remark I made on a reply of Tony. Tony wrote to FORMAT the RK07 pack. I told that under RT11, you can use INIT, but to FORMAT you need XXDP. Allthough that can be true for some media, I was wrong regarding the RK07. Perhaps I was a bit mislead by my RK07 drive, but the following tests show that Tony was correct. I booted RT11 on the 11/34 from DL0:. These are the commands and their responses that I got, after I loaded a pack (and READY on) .DIR DM0: ?DIR-F-Error reading directory .INIT DM0: DM0:Initialize: Are you sure? Y ?DUP-F-Size function failed .FORMAT DM0: DM0:FORMAT-Are you sure? Y ?FORMAT-F-Device not ready ?FORMAT-I-Formatting aborted Looking at the RT11 response, it seems that FORMAT is supported for the RK07, just as Tony said! It also shows that I am not completely out of the weeds ... - Henk. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.