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Date:      Fri, 10 Mar 2000 13:20:49 -0700
From:      Chris Fedde <chris@fedde.littleton.co.us>
To:        "'Peter Radcliffe'" <pir@pir.net>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: disk cloning (& a bit of picobsd) 
Message-ID:  <200003102020.e2AKKnm75550@fedde.littleton.co.us>
In-Reply-To: Your message of "Fri, 10 Mar 2000 12:51:12 EST." <20000310125112.F2584@pir.net> 

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"'Peter Radcliffe'" writes:
 +---------------
 | Ken Bolingbroke <hacker@bolingbroke.com> probably said:
 | > Is there a particular reason you say dd is evil for disk cloning?  I admin
 | 
 | It can screw up partitioning, can waste space on the disk and can
 | generally mess up in weird ways and cause problems later for an unwary
 | admin.  The questioner seemed somewhat unwary.
 +---------------

Hence the phrase  "for similar drive geometries"  when I recommend
using dd to clone drives.  Without that you can get into all kinds
of interesting problems, as you point out.

Still for many large installations with large numbers of identical
systems the dd technique is faster and more reliable than some of
the more complex techniques that attempt to read and write partition
maps, newfs and then use dump/restore to copy contents.

YMMV
chris

__
Chris Fedde	  <chris@fedde.littleton.co.us>
303 773 9134


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