[clug] Best way to backup an entire harddisk

[Alastair D'Silva]

Before dding, create a large file with compressible data (eg, dd
if=/dev/zero of=$fs/zero), then remove it. This will allow your image to
compress better.

You can also use dd with gzip/bzip2 to compress on the fly:
dd if=/some-device | bzip2 > /some/other/filesystem/file

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-----Original Message-----
From: linux-bounces+clug=d-silva.org at lists.samba.org
[mailto:linux-bounces+clug=d-silva.org at lists.samba.org] On Behalf Of Steve
Walsh
Sent: Thursday, 9 February 2006 12:36
To: linux at lists.samba.org
Subject: RE: [clug] Best way to backup an entire harddisk

Hi Chris

You could look at using dd to duplicate the disks, but you would need the
new disk to be at least the same size as the original one. You can then
connect both disks and reboot the machine with a live CD and either use dd
if=/dev/hda1 of=/dev/hdb1 for each partition, or just use dd if=/dev/hda
of=dev/hdb but be aware if you go from IDE to SATA or SATA to IDE that you
will need to modify some files in the boot loader, etc. The latter option
might also be something you want to do before heading to bed or out to see a
movie, it might take a while..

Steve

-----Original Message-----
From: Christopher Zhang
Sent: Thursday, 9 February 2006 12:13 PM
To: linux at lists.samba.org
Subject: [clug] Best way to backup an entire harddisk


Hi,

I have just finished installing a tomcat server on apache2, I would like to
deploy this system to a different machine in a remote location. What is the
best way to do this?

I have tried G4L (Ghost for Linux), Mindo, etc. Given that the current
machine doesn't have a burner, if not storing the new image across the
network, does that mean I have to create a spare partition or mount an
external harddrive to backup the system?

With the former approach, say I have /dev/hda1 as / , /dev/hda2 as / home,
Do I need also to create a /dev/hda3, and put the creating image in there?
Then burner them, but how do I restore them to a new machine?

With the latter approach, I could use dd to copy the entire disk bit by bit,
say if the harddisk is 80 GB, do I need another one at least as big as the
first one?

Or is there other way to do this?

Thanks

Chris
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