Giorgos Keramidas wrote:
On 2006-02-09 14:36, Martin McCormick <[EMAIL PROTECTED]> wrote:
After installing FreeBSD5.4, the ISC dhcp server and ISC bind
on a hard drive, I wanted to clone that drive to a second drive so as
to generate a second server, using what I had already installed as a
template. I used the following command:
dd if=/dev/da0 of=/dev/da1 bs=512
It turns out that dd defaults to 512-byte blocks so I didn't
really need the bs=512, but I am not sure I haven't made some other
type of mistake. The dd command has been running for about 4 hours on
a very fast system, with a 1-gig processor, 1 gig of RAM and two 31-GB
drives. One would think it should have finished by now, but it is
still running. Is this a valid method of copying the entire contents
of one drive to another? Thank you.
Bah! That's too slow for my taste. I would usually go for a newfs,
dump, and restore option. For instance, to create a copy of /usr on a
second disk:
newfs -U /dev/ad1s1a
mount /dev/ad1s1a /mnt
dump -0 -a -L /usr | ( cd /mnt ; restore ruvf - )
Copying with dd(1) is not as fast :)
Sorry to butt in --- but I'm needing to start cloning too. Looks
like a winner to me ... wouldn't this have the added advantage
of making "same size and geometry" (cf. Erik Trulsson, 4 hours ago,
this thread) less relevant?
As long as the "new" slice had enough space, geometry shouldn't
matter to dump|restore .... <?>
Kevin Kinsey
--
A committee is a group that keeps the minutes and loses hours.
-- Milton Berle
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