RL drive problems ...?

Hi, I would like to hear from the specialists what they have to say about this problem. I finally got my 11/34C running again. It has an RL11 and has two RL02 and one RL01 connected. Most of the time I cannot boot RT11 from the RL02-DC, but sometimes the boot is successfull! If the boot fails, I see the READY lamp of the drive flash once, then the RUN light goes off, and the display shows 000004. BTW, at the end of the RL drive chain is of course the terminator. The cartridge was written while the system was still in my house (some 3 years gao, at some 20" Celcius), but the system is now in a 12" Celcius environment. Could the temperature difference make the disk too difficult to read in the nwe conditions? When RT11 runs, and I only do a .DIR command of the disk, is there something written to the disk? That could make the disk "useless", because of the 20"/12" Celsius issues? Another problem that I have since I have power for my systems is that the READY lamp of the RL01 is *always* ON. The FAULT lamp is OK - and is OFF. I have not yet investigated this problem, but hints in advance are appreciated :-) [would save me some time, to work on the other projects, like the floppy disk interface for the 6809 Core Board...] BTW, the system worked fine, 3 years ago ... it has power since a few weeks, and I had a lot of problem getting the 11/34C up and running, but that would be a different story too ... greetz, - Henk, PA8PDP 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.