7 Replies Latest reply: Mar 19, 2007 8:51 AM by Kappy
RioCreations Level 1 Level 1 (90 points)
Hi everyone,

I need to reinstall my OS X and I have had the misfortune of a damaged/scratched disk. As I tried installing it I got a message saying Ignore or Clean it (something like that). I tried wiping it clean but I see the marks on it and they won't come off. I'm stuck!

1) How do I repair it?
2) How can I make a back-up of it?

Rio.

2x2.66GHz Dual-Core Intel Xeon Mac Pro, Mac OS X (10.4.8), 1GB RAM
  • infinite vortex Level 7 Level 7 (21,400 points)
    1) Generally speaking once the surface of an otical disc is damaged it's unrecoverable. You might want to call a specially audio store and ask what they recommend as the treatment will be the same.

    2) Use a tool like Roxio Toast Titanium and try to make a disk image of it first. If you can make a disk image you can make a copy from that disk image. Failing that, try doing it in another Mac or with an external optical drive as some optical drives are more sensitive to certain damage.
  • Kappy Level 10 Level 10 (260,365 points)
    First, scratches on the bottom of a disc may not be the problem. Be sure to clean both surfaces. The actual data are recorded on the surface just below the label as well, so be sure both surfaces have been cleaned. In many cases scratches on the bottom won't be a problem.

    You cannot repair a CD/DVD because they are read-only media. But you can attempt to make a clone of it. You can use Disk Utility for this:

    <font "size=+1">Duplicate a CD or DVD

    1. Insert the DVD/CD;
    2. Open Disk Utility, and select the DVD/CD from the left side list (select the DVD/CD icon on top);
    3. from the DU File menu select New | Disk Image from Disk 1;
    4. Choose to format the disk image as DVD/CD Master, name the disk image and click Save;
    5. When the .cdr file is finished select it with mouse and press COMMAND-I to open the Get Info and check the box to lock the file;
    6. Choose the .cdr file from the left side list, click Burn, and insert a new, blank DVD or CD.

    There's no guarantee this will work, but sometimes it will. I've had success with it a couple of times.



    Why reward points?(Quoted from Discussions Terms of Use.)

    The reward system helps to increase community participation. When a community member gives you (or another member) a reward for providing helpful advice or a solution to their question, your accumulated points will increase your status level within the community.

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  • RioCreations Level 1 Level 1 (90 points)
    Hi Ned Snowing,

    Your advice was helpfull. I did try your 2nd option first to make a Disc Image out of my original DVD with Disc Utility but it did not work. I got an error message with every option I tried.

    I finally got fed up and took your first recommendation and a friend also suggested the same method. I got the Install DVD repaired (Scratches got stipped and the Disc got rebuffed) by a Specialty store for a few dolllars. I was sceptical about that method because your Disc get a little thinner but it worked!

    I was able to reboot with the repaired DVD.

    1) Now I still want to back up my 2 Original Install DVDs. How can I burn each one onto a single layer DVD since they seem to be over the 4.7 GB. How did Apple put them on Single layer DVDs?

    2) How can I reward both you and Kappy at the same time on this post? Both of your tips were helpfull...I'd like to ad a Helfull Icon and a Solved Star at the same time. Is that possible?

    Rio.
  • RioCreations Level 1 Level 1 (90 points)
    Hi Kappy,

    I also wanted to thank you for YOUR advice on turning a damaged Install DVD into a Disc Image. Your instructions were very clear but it did not work with the damaged disc.

    I did try to make a disc image from the repaired DVD but it was too big to fit onto a single layer DVD and I don't know how Apple did it!?!

    I do however want to reward you as well as Ned Snowing for the advice given. As I asked Ned, Is there a way to reward both of you seperately so you can get your points?

    Rio.
  • infinite vortex Level 7 Level 7 (21,400 points)
    1) What you need to do is go out and buy some dual-layered 8.5GB disccs. I had to do that same when I made backup copied of my discs.

    2) What you can do is give one of us the Solved and the other two Helpfuls. That'll give us both 10 points (if that's your intent of course). Unfortunately the system won't allow for anything else.
  • The hatter Level 9 Level 9 (60,880 points)
    One thing that I have done successfully is to use Restore to copy a DVD to a hard drive partition. From there you can then - very quickly - boot and run the installer. No need to boot from DVD. That has been possible since 10.3 probably.

    So while no help if the DVD is not readable, it is another option along with making backup copies to DVD (which you would then use and leave the master copy alone).
  • Kappy Level 10 Level 10 (260,365 points)
    Glad we were able to help you resolve your problem.

    As for "rewards" you have a couple of options. The responder whom you believe "solved" your problem you can reward by clicking on the Solved button included with his/her reply that contained the solution. If you wish to reward other responders whom you believe provided "helpful" replies but not the final solution, then you can click on the Helpful button included with one of his/her replies. You can provide a Helpful reward twice (to the same person or two different people.) The Solved reward can only be given to one person.

    See below:

    Why reward points?(Quoted from Discussions Terms of Use.)

    The reward system helps to increase community participation. When a community member gives you (or another member) a reward for providing helpful advice or a solution to their question, your accumulated points will increase your status level within the community.

    Members may reward you with 5 points if they deem that your reply is helpful and 10 points if you post a solution to their issue. Likewise, when you mark a reply as Helpful or Solved in your own created topic, you will be awarding the respondent with the same point values.