On Wed, 25 Jun 2008, Lanny Marcus wrote:
On Wed, Jun 25, 2008 at 1:46 PM, Les Mikesell <lesmikesell@xxxxxxxxx> wrote:
Hiep Nguyen wrote:
hi all,
i have a centos box and would like to back up just in case the hard drive
fail. one way to do this is duplicate the image of the hard drive, so if
the hard drive fail, just remove it and put mirrored hard drive and done.
here my system info:
uname -a
Linux jadenet.jadesterling.com 2.6.9-22.0.2.EL #1 Tue Jan 17 06:51:40 CST
2006 i686 i686 i386 GNU/Linux
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
37G 15G 20G 43% /
/dev/hda1 99M 8.9M 85M 10% /boot
none 188M 0 188M 0% /dev/shm
i'm looking into dd, but is there anything better than dd?
by the way, i would like to use external hard drive via usb to do mirror
image.
dd has the advantage of creating a disk that is instantly usable. The
disadvantages are that you have to have it unmounted while making the copy
(boot from a CD) and it takes a long time to complete since you have to copy
even the unused blocks. There is also the possibility that your working
disk will develop a bad spot that you don't realize until you hit it during
the copy, leaving you with 2 bad disks (rotating 2 copies would avoid this
issue).
Clonezilla-live is a boot-from CD linux that will copy just the used
portions of the disk and can save to another disk or image files on local
disks or over the network. I'd recommend it over dd, but maybe someone has
a way to do LVM snapshots so the copy can be done without a reboot.
I'm downloading the .iso for clonezilla-live now. It's a very small
download. 81.2 MB
i don't know if this is possible, but assume my centos box's motherboard
goes sour, can i just take its hard drive and put on similar pc?
thanks
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