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Old 04-06-2007, 12:56 AM   #1
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Partition cloning using dd

I have Suse 10.0 on my hard disk. I managed to mess up my entire partition table and therefore lost windows server 2003(which i unfortunately need for some college project.) When i try to install Windows, after install it gives me some error like "Missing Operating System." So i guessed its some partition problem.
Well, so i decided to save my current Linux Partition into an image, remove all partitions, install windows, and then restore Linux, using that image.
I have two hard disks, hda and hdd. I would like to save an image of hda3 in hdd1/suseimage.img.
I roughly know the method, but could you please tell me in short how to go about it. I have data in hdd1 and dont want to lose that. Also, when restoring should the partition sizes exactly match. Please help.
Old 04-06-2007, 05:48 AM   #2
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You should have a read at Awesome's dd thread:

Look for this command below and read down a bit, you may even want to compress it with gzip or bzip, in this command below you would change sdb2 in the "if" part to hda3, for the "of" section you would do something like this: 'of=/dev/hdd1/suse.img', BUT!, if hdd1 is a visible drive in Suse and has a mount point in /media or /mnt, you would have to change the "of" part to use the directory. For instance, if the drive is accessible from /mnt/data, your "of" section should be 'of=/mnt/data/suse.img
dd if=/dev/sdb2 of=/home/sam/partition.image bs=4096 conv=notrunc,noerror
WARNING: Don't take my example to heart, read the article, dd can be dangerous if not used properly!
Old 04-06-2007, 06:20 AM   #3
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The message about no operating system is probably due to the mbr being wiped out. See if the partitions exist before reinstalling. You may just need to run the "fixmbr" program. Some linux distro's save a backup of the mbr to the /boot directory. You may be able to use dd to copy the backup mbr to /dev/hda after booting up with a rescue disk.

Also use fdisk to mark the drive as active.

Last edited by jschiwal; 04-06-2007 at 09:07 AM.


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