RAID 1 for the Macintosh HD?

Discussion in 'Mac Pro' started by caymandrew, Jul 28, 2012.

  1. caymandrew macrumors newbie

    Joined:
    Jul 25, 2012
    Location:
    All over the place
    #1
    My searches haven't turned up much. I have four drives, two 2 TB sata and two 3 TB sata. I'd like to mirror each set with RAID 1

    I had no problem setting up the raid for the two 3 TB's but the 1st of the 2 TB set has the mac os on it. Can I clone the OS drive to an external and boot from it somehow? How do I get around this?

    Thanks!
     
  2. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #2
    If you create a mirror out of drives with data on them, it will be wiped out.

    To do what you want however, use the following:
    1. Make a clone of the OS to a separate disk.
    2. Change the boot location to the new clone.
    3. Reboot.
    4. Create the Mirror set using the desired drives.
     

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