[CentOS] transfer data from one hard drive to another
chrism at imntv.com
chrism at imntv.com
Sat Oct 7 12:10:19 UTC 2006
Lamar Owen wrote:
> On Friday 06 October 2006 22:42, Joseph Cheng wrote:
>> Thx for all the suggestions ppl. I think for simplicity I will either
>> go with the knoppix & dd solution or I also found ghost 4 unix
> I have used the dd solution a number of times, and it works quite well.
> There are, however, a couple of suggestions I would make:
> 1.) Use the CentOS rescue mode (boot CD number 1, type 'linux rescue' at the
> boot prompt) and tell it not to mount your drives. No need to download Yet
> Another Linux Distribution to do the work. Or use the CentOS LiveCD.
> 2.) While the dd is running, you can check on its progress. Switch to another
> virtual console (you are by default on VC 1; hit ALT-F2 to go to VC 2) and
> send the dd process a SIGUSR1 (run a ps ax and make a note of the dd
> process's PID; then kill -USR1 $PID); then switch back to VC 1 and you'll see
> where dd is in your copy.
> You can then run fdisk or parted and grow the partition; then you can resize
> the filesystem (I'm fairly certain the rescue mode includes the resizing
> program; not sure about the LiveCD, but I would think it does). The native
> CentOS tools to do this are, in my experience, far superior in quality to the
> various third party solutions (including Symantec Ghost) availabe to do this
> sort of thing. They are a little harder to use, though they seem to work
Interesting. I wonder if you used this method to copy the image from
one disk to an identical disk hda-->hdb if you could then unplug hda and
have the system boot from the "copy" without any other intervention.
Kind of like a poor man's RAID1 except you only get back to where you
were at the instant the snapshot was taken. I've never tried this since
RAID cards are so cheap, but I guess I'm wondering out loud if that
would work. Anyone tried it?
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