Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site dicomed.UUCP Path: utzoo!watmath!clyde!burl!mgnetp!dicomed!boylan From: boylan@dicomed.UUCP (Chris Boylan) Newsgroups: net.unix-wizards,net.bugs.4bsd Subject: Re: tbuf par faults and 4.2bsd Message-ID: <200@dicomed.UUCP> Date: Wed, 6-Jun-84 12:01:21 EDT Article-I.D.: dicomed.200 Posted: Wed Jun 6 12:01:21 1984 Date-Received: Thu, 7-Jun-84 08:06:55 EDT References: <125@godot.UUCP> Organization: DICOMED Corp., Minneapolis Lines: 36 As I said before, the problem I am having with the tbuf errors is that the flush and return fix doesn't work too well if (as it appears) it gets a second tbuf par error before it finishes it's work. What's happening with our 750 is a 4 (MC750_TBPAR) in mcesr and the thing fails to recover because it gets a second mchk 2 as it's returning from the trap. Since I am currently using the stock 4.2bsd ra81 driver I do not get a dump of the system when this happens but it seems obvious that the second error is probably another tb parity error. This being the case, I really don't see what can be done to fix this problem aside from fixing the source of the problem, thus my relief that DEC is actually shipping the REV 6 upgrade. However, the local dec people just talked to me somemore about this fix and as they are currently distributing it, you CANNOT do an autorestart and still load the microcode patches. I am told there is already one site in Minneapolis running with REV 6 and the new micro code which they load from a diagnostic cassette and then reboot by hand. This brings up two questions: What is the straight story on the DEC UEG code to reload the control store in the unix boot cycle being worked on/released? This sounds too good to be one or more of: free available true. Do the patches HAVE to be loaded to run? I'm sure not driving back into work to reload the control store... Our night usage is not enough that we couldn't just run degraded until morning but I would rather be up... -- Chris Boylan {mgnetp | ihnp4 | uwvax}!dicomed!boylan