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compress iso for windows xp backup

Link to this post 31 Jan 11

I want to use linux to image a windows hard drive and save the .iso to a dvd disk how do I do that? windows hard dive is 200gb my dvd is 4.1gb. Remastersys has compresstion for the iso but dont want a copy of the live cd along with the windows image. If I use the dd if=/dev/hda of=/tmp/hardrive.iso bs=1024 command the image is to large for the dvd. someone told me i could try

mkisofs -V LABEL -r DIRECTORY | gzip > cdrom.iso.gz—creates a compressed ISO for easy backup (replace the italicized sections with your CD label and directory, of course)

but i just want to be able to put in the cd and use the live cd with
dd if=/CDROM/hardrive.iso of=/dev/hda
to restore the image

Someone else told me to try a CramFs but they nor I know know how to make one.

Or type "mkisofs -o /tmp/cd.iso /tmp/directory/" To make an ISO from files on your hard drive

Link to this post 31 Jan 11

Please don't post the same question in 2 different forums. You get the same exposure posting once.

I'm sorry I can't give you an answer to your question, hopefully some else will come by with the answer.

BTW - I deleted your other post so the discussion remains in one thread.

Link to this post 07 Apr 11

It is unlikely that you will be able to fit that 200GB image on a 4GB DVD, even if you compress it. Depending upon how empty the 200gb drive is, you might be able to compress it enough to fit on a 32gb SD card. It won't be an iso image, however. It will be better - a bit-image (true) copy of the entire disc. I do this regularly to backup my system discs. A 250GB Linux system disc for my laptop compresses to a bit over 20GB using gzip. bzip2 compresses quite a bit better, but it is a lot more CPU intensive and slower. It's the old time vs. space problem... :-)

Link to this post 08 Apr 11

There's no way you can fit 200gb into a DVD (the odds of that are close to 0 ).

You'll have to rethink the way you backup things

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