RAID 1/Drive Mirroring without Erasing Drives?

Discussion in 'Mac Basics and Help' started by cclloyd, Jan 13, 2018.

  1. cclloyd macrumors 68000


    Oct 26, 2011
    Alpha Centauri A
    Is there any app/program I can use to mirror 2 external hard drives so that they stay in sync, without erasing them first? All the guides I see online either require a raid card, or require me to erase the drives first.
  2. HDFan macrumors 65816

    Jun 30, 2007
    If you want automatic mirroring you're looking at setting them up using RAID 1 and likely wiping the disks. [Not totally sure about the wiping. Higher raid levels such as 5 require reformatting in order to set up the striping information across disks]. You can manually synch the disks on a schedule using carbon copy cloner. I believe the smallest granularity is hourly.

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