Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site umcp-cs.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!mcnc!philabs!cmcl2!seismo!umcp-cs!chris From: chris@umcp-cs.UUCP (Chris Torek) Newsgroups: net.unix-wizards Subject: Re: Rebooting 4.2BSD on a 780 Message-ID: <405@umcp-cs.UUCP> Date: Sat, 22-Jun-85 17:54:10 EDT Article-I.D.: umcp-cs.405 Posted: Sat Jun 22 17:54:10 1985 Date-Received: Sun, 30-Jun-85 00:30:31 EDT References: <11030@brl-tgr.ARPA> <412@mtxinu.UUCP> <332@basser.oz> <323@umcp-cs.UUCP> <368@cheviot.UUCP> Organization: U of Maryland, Computer Science Dept., College Park, MD Lines: 47 > From: andy@cheviot.UUCP (Andy Linton) > > Try looking at Section 6.1 in "Installing/Operating 4.2BSD" > - Section 62 in Volume 2 of the system manual. > It suggests that when at the console command level you can > say:- > >>> B ANY Yes, that happens to be wonderful and we use it all the time WHEN WE ARE IN THE MACHINE ROOM. What I was suggesting was a way to boot from an alternate file while you're dialed in or logged in from across campus, or across country, or whatever. (Sorry about the shouting.) By the way, some 750 boot ROMs have a bug that loses the flags if you don't specify the device name, so we generally do B/3 DUA0 to come up single user from something other than ra(0,6)vmunix. (Yes, our root file system on our 750s is on /dev/ra0g.) You can also use B/2 to come up single user from /vmunix, or B/1 to come up multi-user from some other file. For 780s, use B HPS to come up single user from hp(0,0)vmunix, or type Halt Unjam Init LOad BOOT Deposit R10 0 ! boot from hp (2=up, 3=hk, 9=ra, 10=ut, 11=rb, 14=rl) Deposit R11 1 ! or D R11 2, which is what HPSBOO.CMD does STart 2 (The UPPercase stuff is the required parts of the full commands---or at least the part I type; load might be abbreviable to "L"....) At one point we were using R9 for the disk and partition numbers so that we could boot off of hp(9,0)vmunix (MBA1 drive 1 partition 0), but that's nonstandard and we got rid of it later. (I was going to move the extension into the upper halfword of R10, since it's normally zero, but we haven't needed it since then. . . .) -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251) UUCP: seismo!umcp-cs!chris CSNet: chris@umcp-cs ARPA: chris@maryland