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Date:      Fri, 10 Mar 2000 08:58:26 -0800
From:      "Kevin Oberman" <oberman@es.net>
To:        freebsd-questions@freebsd.org
Subject:   Cloning the root partition
Message-ID:  <200003101658.IAA31252@ptavv.es.net>

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Warning: I'm probably doing something really dumb!

I am trying to clone the root partition on my 3.4-Stable system and I
don't seem to be able to get it to work. The 'a' partitions are the
same size on both disks. Both start a block 0 of the slice and both
are 102400 long.

Running standalone I use the command:
# dd bs=1024 if=/dev/rwd0s1a of=/dev/rwd1s1a

I assumed using the raw devices would exactly clone the partition,
including the file system. Perhaps I simply don't understand how
things work. The man page was not too helpful.

If the output partition is not mounted, I got an error that the output
is read-only. If I mount the device, I got a message that the input
device is busy.

What combination of partition status and command syntax might work?

Thanks,

R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634



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