adoyle@bbn.com (Allan Doyle) (08/29/89)
Scenario: We have a Sun-3/280 based system at a customer site. We want to install a second system at the site. In order to give the customer a performance bonus, we want to upgrade to a 3-3/480. Our customer has spares for the 3/280 and does not want to pay for a spare 3/480 CPU. We say "No problem, use the 280 spare as a fallback and the second system will run, albeit a little slower." Problem: When I plug a 280 CPU into the system from which I have pulled the 480 CPU, it does not boot. I have, of course, already copied a kernel built on a 280 system into the root partition. The boot program gives up right away because of a page mapping problem. Obviously, I'm getting bitten by boot code that was configured for a 68030 with native MMU, or am I? What is going wrong here? How do I fix it? Once I get the sucker to boot, what else is going to bite me. I noticed a bunch of symbolic links in /usr/shar/mdec that are CPU specific. The real question is: How do I put the 280 CPU into the system with the shortest turnaround? The path of doing a new installation of 4.0.3 each time I swap CPUs will probably work but takes too long. (The client after all, likes short repair times...). Any ideas you folks have will be welcome. I will post a summary and if I get a good procedure, I'll post that as well. Allan Doyle Allan Doyle adoyle@bbn.com BBN Systems and Technologies Corporation (617) 873-3398 70 Fawcett Street, Cambridge, MA 02138
poffen@sj.ate.slb.com (Russ Poffenberger) (09/20/89)
In article <1232@brazos.Rice.edu> adoyle@bbn.com (Allan Doyle) writes: >X-Sun-Spots-Digest: Volume 8, Issue 109, message 8 of 12 > >Scenario: > > When I plug a 280 CPU into the system from which I have > pulled the 480 CPU, it does not boot. I have, of course, already > copied a kernel built on a 280 system into the root partition. > The boot program gives up right away because of a page mapping > problem. > Did you copy the correct version of /boot onto the hard disk? This is the actual boot code. Also after copying, you must do an installboot on it (if 4.0.x, you didn't specify) to make it work. Russ Poffenberger DOMAIN: poffen@sj.ate.slb.com Schlumberger Technologies UUCP: {uunet,decwrl,amdahl}!sjsca4!poffen 1601 Technology Drive San Jose, Ca. 95110 (408)437-5254