Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!mit-eddie!uw-beaver!tektronix!tekgen!raven!mike
From: mike@raven.TELCOM.TEK.COM (Mike Ewan)
Newsgroups: comp.sys.dec
Subject: Re: PDP 11/23
Keywords: PDP 11/23
Message-ID: <1066@raven.TELCOM.TEK.COM>
Date: 24 May 89 14:16:51 GMT
References: <1989May19.082926.1003@mntgfx.mentor.com>
Reply-To: mike@raven.TELCOM.TEK.COM (Mike Ewan)
Organization: Tektronix, Beaverton OR
Lines: 34

In article <1989May19.082926.1003@mntgfx.mentor.com> swhitchurch@mntgfx.mentor.com (Steve Whitchurch) writes:
>
> I have a PDP 11/23 running unix 2.9.1, the system has one cpu,
> one RL02 disk drive and two RL01 disk drives. The unix os is
> on the RL02 drive. What I need to do is backup the os, any
> suggestions ????

I'm assuming you're using at least one of the RL01's as a removeable disk.
That is, it's off line most of the time.  If so, get two RL01 disk packs,
and do the following:

	Shutdown to single user mode.
	Put the first pack in the RL01.
	Issue the command:

	    dd if=rrl0h of=rrlxh bs=5120 count=1000
	    (note.            ^  Substitute the drive number of
		the RL01 here ^ .)

	When that's done, replace the RL01 pack with the second one and do:

	    dd if=rrl0h of=rrlxh bs=5120 skip=1000

	If you ever need to restore, then switch the little drive number
	buttons on the RL's, boot off the backup RL01, and reverse the
	dd commands.

I hope this helps.
Mike
-- 
 Michael Ewan    (503)627-6468        ucbvax...\ 
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