On Sun, Jun 14, 2009 at 4:58 PM, <WVerish at aol.com> wrote: What changed? Did you lose power/do a hard shutdown? Did a drive die? Did you reconfigure the Qbus? OK. Help with what? Do you mean that you had a KFQSA board in the machine and swapped in a new one? If so, did you check the jumpers first? (I don't know anything about the KFQSA itself, but most DEC controllers had jumpers so that if nothing else, you could assign them a new CSR address to allow more than one of that type of controller on a bus). OK... so your disk controller isn't showing up it seems. Barring defective hardware (which is rather uncommon in my experience), the biggest issue with the Qbus is making sure that you don't have CSR conflicts and you don't have an open bus grant chain. Either of those can be an issue if you are reconfiguring your machine. I know lots about the arrangement of older Qbus machines, but not the 3800. From what I remember, it's a straight-across bus, not serpentine, but I'm not positive what's under those Sbox cover plates. If you have any "gaps" - places where there are no boards between the CPU and other boards, that will cause a bus grant problem. There are bus grant jumper cards for Qbus (M9047) - it's a mostly blank card with some pin-to-pin jumpers by the edge. Since you say you are a 'newbie', let me say that the Qbus and Unibus are not like PCs in that you can't have an empty slot in the middle of the pack. You either have to move all cards up (and "up" is defined by your backplane geometry, not just simply first slot, second slot, etc) or you have to bridge the interrupt and DMA signals with either grant cards or (for Unibus) wire wrap wires. I don't know how you've moved things around, so I just have to guess at that, but it's a common issue with folks new to DEC machines. You might find this illuminating - <http://hoffmanlabs.org/openvms/hwvax/hwqbus.shtml> - but keep in mind that your backplane geometry (the order and arrangement of "slots" in the Qbus) compared to the older BA23 and BA123 boxes. I don't have any install media new enough for your machine (my stuff goes up to the MicroVAX II/MicroVAX 2000 era), so I can't help you there. If you are still having problems, I happen to live in Columbus, but get up to Fairview Park about once a month it seems (I was just up there two weekends ago), so perhaps I could provide some in-person advice at some point in the future. -ethan