[1294] in RedHat Linux List
Use of dd to copy a drive
daemon@ATHENA.MIT.EDU (William T Wilson)
Sun Oct 27 15:05:45 1996
Date: Sun, 27 Oct 1996 15:03:25 -0500 (EST)
From: William T Wilson <fluffy@benatar.res.cmu.edu>
To: redhat-list@redhat.com
In-Reply-To: <Pine.LNX.3.95.961027131932.1966C-100000@benatar.res.cmu.edu>
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
On Sun, 27 Oct 1996, William T Wilson wrote:
> In comparision to "dd if=/dev/XXX of=/dev/XXX" the command structure you
> propose seems very complex. dd also gets all files with permissions
> down to the bit level and will not cross mount points. The beauty of
The problem with dd is that the two drives (and the two partitions) have
to have exactly the same geometry else it will not only not work but
corrupt your destination drive and cause you to have to reformat it. And
nothing else can write to the drive while this is going on, either, or
random data-corruption type things will happen. It is generally best not
to rewrite the underlying filesystem. Although the "find" method proposed
is complex, at least it's safe... (though the "tar" method and cp -a are
safe and easy).
--
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