RAID 1 or Carbon Clone Copy

Discussion in 'Mac Basics and Help' started by fivepoint, Aug 20, 2008.

  1. fivepoint macrumors 65816


    Sep 28, 2007
    I'm in the process of putting all of my iMovie '08 files onto external disks to save space on my iMac. I'm using 2 750GB iomega Ultramax Hard Drives (FW800,400, USB 2.0, eSATA). I'd like to make sure that all of my external data is redundant, but am unsure about the best way to proceed with this. Any suggestions or benefits/negatives with each option would be helpful. Thanks!

    Choice #1) Set up the two drives as a RAID 1 grouping through OSX Disk Utility. Save files to the disk set.

    Choice #2) Set up the 2nd drive to backup the 1st drive daily (or weekly) with Carbon Clone Copier. Save files to first drive only.
  2. CanadaRAM macrumors G5


    Oct 11, 2004
    On the Left Coast - Victoria BC Canada
    Backup and RAID 1 (mirror) are not the same thing

    Backup (whether a periodic copy or an incremental copy) saves your data as at a specific moment in time. The amount of data you are at risk of losing depends on the interval between backups.

    RAID 1 mirrors in real time. The problem is, if you accidentally delete or overwrite a file, it is messed on the mirror at the same instant it is messed on your original drive. RAID also imposes some processing and transmission overhead as you are working. Backup takes time, but can be scheduled for overnight or when you are not at the machine.
  3. merl1n macrumors 65816


    Mar 30, 2008
    New Jersey, USA
    RAID 1 is easier but appears as one file system. If you get any file system corruption though, both disks will be affected (the main and mirror).

    CCC is also a good option but requires manual updating (but I think you can schedule it to run automatically).

    I, myself use RAID 1 for all of my video files.
  4. blodwyn macrumors 65816

    Jul 28, 2004
    Portland, Oregon
    From my own experience I'd say it depends on whether you'll be using the drives via USB or Firewire. I had problems with a RAID mirror on USB, where once in a while one disk would drop out when I plugged another USB device in. Admittedly, they were on a Belkin (powered) hub, but the drives did have their own power bricks. This meant a re-silver was necessary, which took ~18 hours every time. I had no problems with Firewire.

Share This Page