Unix administration - Copying a HD to another in stages

Author

Copying a HD to another in stages

binary-nomad@hotmail.com

2005-04-13, 6:00 pm

Hi,

How can I accomplish this? I would like to use dd, I think, since cp is
not really what I'm looking for - eg. if the 2nd drive is unformatted,
and the 1st is Reiser, the 2nd one will automatically become Reiser,
yes? At leas, till the part that the files take up?

If not, and the 2nd is formatted to Reiser, will just cp work? What's
the exact command, to make sure it copies *everything*?

In any case, how do I do it in stages? ie. copy a bit, and then resume
from where the first copying left off? My first drive is pretty old and
rickety, I DON'T want a continuous 10GB read from it, it is *sure* to
kill it.

Thanks a lot,

The Nomad.

HeWillRejoice@yahoo.com

2005-04-13, 8:52 pm

I came up with a way using find and a shell script. Do you have perl?
If so I could write a better way. The problem with using a shell
script is having it pause periodically like you want it to. In PERL it
would be easier. Here is one way using the shell, tar, and find:
1) format new drive & make the file system & mount it at /newdrive
2) create the shell script: (as root)
cat > /tmp/ttt
#/bin/sh -v
tar -cf - "$1" | ( cd /newdrive; tar -xf - )
(hit ctrl-d)
chmod 755 /tmp/ttt
cd (source directory)
find . -exec /tmp/ttt {} \; -exec sleep 1 \;

This will copy over one file at a time and then sleep 1 second. Very
slow to do a whole disk. It's just an idea to help you get started.
I'll try to think of a more clever way to pause less frequently.

Boyd
P.S. You can write me directly at TBMoore(remove the
parenthesis)@bealenet.com

___cliff rayman___

2005-04-14, 2:51 am

binary-nomad@hotmail.com wrote:

>In any case, how do I do it in stages? ie. copy a bit, and then resume
>from where the first copying left off? My first drive is pretty old and
>rickety, I DON'T want a continuous 10GB read from it, it is *sure* to
>kill it.
>
>
use rsync with the -bwlimit command. that will make sure you have a
copy of the entire drive and you can throttle the bandwidth.
man rsync
--

_____cliff_rayman_______________________
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Business Consulting and Turnaround Management
[web] http://www.rayman.com/
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Jerry McBride

2005-04-15, 2:49 am

binary-nomad@hotmail.com wrote:

> Hi,
>
> How can I accomplish this? I would like to use dd, I think, since cp is
> not really what I'm looking for - eg. if the 2nd drive is unformatted,
> and the 1st is Reiser, the 2nd one will automatically become Reiser,
> yes? At leas, till the part that the files take up?
>
> If not, and the 2nd is formatted to Reiser, will just cp work? What's
> the exact command, to make sure it copies *everything*?
>
> In any case, how do I do it in stages? ie. copy a bit, and then resume
> from where the first copying left off? My first drive is pretty old and
> rickety, I DON'T want a continuous 10GB read from it, it is *sure* to
> kill it.
>
>
>
> Thanks a lot,
>
>
> The Nomad.
Track down a copy of the HARD DISK UPGRADE HOWTO of the LDP. It'll give you
some really nice info along the lines of what you want to do. The only step
you may want to change is formatting the target hard drive as reiser,
making sure the kernel you arte going to use has the reiser module compiled
in the kernel (not a module), make the necessary fstab change and tell
grub/lilo about your plans....

Cheers.

PS. I use that HOWTO all the time and have reduced it to a simple bash
script for cloning hard drives for laptops that I host.

--

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