From bawden at arisia.xerox.com Thu Aug 31 02:22:00 1989 From: bawden at arisia.xerox.com (Alan Bawden) Date: Aug 30 89 17:22 PDT Subject: ml and mc stuff In-Reply-To: <639391.890830.CENT@AI.AI.MIT.EDU> Message-ID: <19890831002221.0.ALAN@MR-BUN.parc.xerox.com> Date: Wed, 30 Aug 89 17:03:03 EDT From: "Pandora B. Berman" you were going to drop us a note explaining how to avoid mc's frequent parerr losses. Here is what you do to disable parity checking: At any time -after- you have started DSKDMP, type ^\ to get the 8080's attention. This should result in a "KS10>" prompt. The you type "PE0" followed by a carrage return. You should get another "KS10>" prompt. Then type ^Z. The 8080 will type "USR MOD" and now you are back where you were before you typed the ^\. The reason you have to wait until after starting DSKDMP is that the BT command turns parity checking on. You really can do this at -any- time once the PDP10 is rinning. You can even walk up to a running ITS and do this. And in fact you should probably do this to MC as soon as possible. also, exactly what is it that's wrong with ML and needs to be fixed asap? the macro tapes file? Right. You can easily see that it is broken by going into DUMP and giving the TAPES command. The output looks like: _tapes LIST DEV =tty 238 890804 INCR ALAN5 DUMP 0 . SYSHST 329 890814 INCR ZVONA DUMP 0 . USERS2 Where the hell are the rest of the tapes? (And yeah, Zvona must have typoed when he made that incremental...) A hacker should look at the bits in the existing MACRO TAPES file to see if he or she can figure out what went wrong. (The latest version of DUMP is a suspect.) To repair the damage, first restore the MACRO TAPES file from tape (try tape 238 first, then 237, etc.), and then use the TAPSET command to enter the information that is missing. From bawden.pa at xerox.com Mon Aug 14 22:32:00 1989 From: bawden.pa at xerox.com (bawden.pa at xerox.com) Date: Aug 14 89 13:32 PDT Subject: Well, -we- had an earthquake. In-Reply-To: <633201.890813.ZVONA@AI.AI.MIT.EDU> Message-ID: <19890814203257.2.ALAN@ROCKY.parc.xerox.com> Date: Sun, 13 Aug 89 13:54:15 EDT From: David Chapman At 10:09 this morning all the ITSes apparently died. The consoles said BT AUTO and were in DSKDMP. I take it this is what happens when the power glitches? Yup. (Probaly the fault of the thunderstorms.) I hope they were good thunderstorms! Anyway, I dumped to ai;auto boot? (probably useless) and booted OK. Yeah, crash dumps are always useless after the 8080 has booted the machine since that clears core. Of course it can't -hurt- to take a crash dump -- you can tell that a crash dump is probably useless if it is very small. (The AUTO BOOT? dump you made is only a block long...) ------- From ZVONA%AI.AI.MIT.EDU at MINTAKA.LCS.MIT.EDU Sun Aug 13 19:54:15 1989 From: ZVONA%AI.AI.MIT.EDU at MINTAKA.LCS.MIT.EDU (David Chapman) Date: Aug 13 89 13:54:15 EDT Subject: No subject Message-ID: <633201.890813.ZVONA@AI.AI.MIT.EDU> At 10:09 this morning all the ITSes apparently died. The consoles said BT AUTO and were in DSKDMP. I take it this is what happens when the power glitches? (Probaly the fault of the thunderstorms.) Anyway, I dumped to ai;auto boot? (probably useless) and booted OK. From bawden.pa at Xerox.COM Fri Aug 11 07:46:00 1989 From: bawden.pa at Xerox.COM (bawden.pa at Xerox.COM) Date: Aug 10 89 22:46 PDT Subject: Barf! Message-ID: <19890811054636.5.ALAN@ROCKY.parc.xerox.com> The MACRO TAPES database on ML seems to be screwed up. This might be a symptom of something wrong with the new DUMP I installed there before I left for here. Symptom: Start DUMP. Give the "TAPES" command. There only appears to be saved tape information for the most recently written tape. I -thought- that the information saved in the records in SYSENG;MACRO TAPES was unrelated to the format of actualy tape headers. Perhaps I was wrong... (But I still don't understand how that could clobber the entire database, even -old- versions of DUMP can't find any information.) Unfortunately for you all, I'm unlikely to be able to fix this from out here. -------