A few disk copy questions

Discussion in 'Mac Apps and Mac App Store' started by ZildjianKX, Sep 21, 2003.

  1. ZildjianKX macrumors 68000

    ZildjianKX

    Joined:
    May 18, 2003
    #1
    Hi, I've read their the entire disk copy help to no avail... they seem to want to help you for making a new CD from files, but not from backing one up.

    Here is my question...

    What is exactly is the difference between the "Compression" option and the "DVD/CD Mastering" option, specifically when you're backing up a CD from device.

    I've been able to find after much searching on the internet that DVD/CD Mastering saves it in ISO 9660 format, but what exactly does compression do?

    To confuse me even more, I backed up my jaguar discs via compression and burned them.... they worked perfectly for an install.

    I was also uncertain about the encryption... does it let you set a password and encrypts the disc?
     
  2. Farside161 macrumors member

    Joined:
    Sep 12, 2002
    Location:
    Portland, OR
    #2
    disk copy makes disk images (.dmg, .cdr) the AES-128 encription allows you to set a password to the disk image. this password only works on a disk image file, not on a CD you create with a disk image. Compression works in a similar way the image on your hard drive is compressed not the data you burn to a CD or DVD. if you are copying a CD or DVD to later burn again use the CD/DVD mastering option.
     
  3. ZildjianKX thread starter macrumors 68000

    ZildjianKX

    Joined:
    May 18, 2003
    #3
    Thanks, so compression just copies the files off of a disc, and compresses them in a mountable image?
     
  4. Farside161 macrumors member

    Joined:
    Sep 12, 2002
    Location:
    Portland, OR
  5. crazzyeddie macrumors 68030

    crazzyeddie

    Joined:
    Dec 7, 2002
    Location:
    Florida, USA
    #5
    It makes a CD/DVD Master (read-only) and the compresses the disk image to save space. Works fine, i have all my CD's stored digitally this way.
     
  6. ZildjianKX thread starter macrumors 68000

    ZildjianKX

    Joined:
    May 18, 2003
    #6
    Ahh, ok... so if I'm making a copy right away, do a DVD/CD mastering...

    But if I'm backing up a CD/DVD and plan to burn it later, compression is the way to go? So both end up with the same result, just that the compression... well, compresses it? :)
     
  7. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #7
    That sounds about right. I always use CD/DVD master, but I'm the sort of person who wastes HD space :rolleyes:
     
  8. ZildjianKX thread starter macrumors 68000

    ZildjianKX

    Joined:
    May 18, 2003
    #8
    Thanks for all your help guys. I guess I'll back up all my future discs with the compression option. :)
     

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