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From: thompson@PAN.SSEC.HONEYWELL.COM (John Thompson)
Newsgroups: comp.sys.apollo
Subject: re: dn3k and new disk
Message-ID: <9106271426.AA19384@pan.ssec.honeywell.com>
Date: 27 Jun 91 14:26:36 GMT
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Organization: The Internet
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> I've got a dn3000 with a 70Mb micropolis disk.  It's running 9.7 because 10.x
> won't really fit on the little guy.  The folks who've loaned me this machine
> want to upgrade it to 10.2, so they send a 360Mb micropolis, supposedly with
> 10.2 already installed on it.   I install the new disk and driver board (the
> note with the board says that all the jumpers are ok) and fire it up.
> ...
> Now I get the message "domain_os unreadable".   In fact, now calendar is not
> readable, nor is dex.  I can still ld and ex config, but not much else.
> salvol won't do much either.
> 
> What do I do now?  I guess I can install 10.2 from tape, but I'd really rather
> not if I can get the disk to boot.  Any tricks to this or am I hosed?

Well, the first thing that comes to mind is CHUVOL.  The disk UIDs (unique-IDs,
not Unix-IDs) will be for the wrong node.  I don't know if the system will 
boot up or not with the wrong node's UID on domain_os.  However, since CHUVOL
is yet another one of those things in your /sau8 directory, I don't know if 
it'll let you EX that any better.  Can you boot diskless off of somebody, and
run CHUVOL?  If not, you might boot off of tape, and try running CHUVOL from
there.  ('DI C'     'EX CHUVOL')

I can't remember the exact questions that CHUVOL asks, but it'll basically
be like salvol -- it'll ask the disk to do, and it'll ask the volume.  Then
it asks for original and new nodeIDs -- I think it prompts with what it
believes are the correct ones.

Hope this helps.  If it doesn't, I hope it doesn't waste too much time.

-- jt --
John Thompson
Honeywell, SSEC
Plymouth, MN  55441
thompson@pan.ssec.honeywell.com

Avoid the rush -- Procrastinate Now!