On Wed, Jun 25, 2008 at 1:46 PM, Les Mikesell <[EMAIL PROTECTED]> 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
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