DIY Fusion Drive -- recovery partition on both drives?

Discussion in 'OS X Mountain Lion (10.8)' started by Vercingetorix, Jun 18, 2013.

  1. Vercingetorix macrumors regular

    Jan 17, 2007
    Atlanta, USA
    I've got a 2011 iMac with the factory-installed SSD/HDD combo. I've been running a DIY Fusion drive for awhile; it works spectacularly. I installed by 1) formatting both drives, 2) setting up the Fusion drive, 3) doing a fresh install of Mountain Lion to create the recovery partition, and then 4) restoring from my clone.

    When I look in diskutil, I see that there's a recovery partition labeled "Boot OS X" on both drives; on the 2 TB HDD, that partition is 650 MB. Not a huge deal, obviously, but I'm unclear why the second drive needs it. Do other DIY Fusion drive users have recovery partitions on both drives?
  2. crjackson2134 macrumors 68040


    Mar 6, 2013
    Charlotte, NC
    Not sure, but it's a great idea and perhaps designed that way. If the SSD dies, you can boot recovery from the spinner. If the spinner dies you can boot recovery from the SSD.

    I may set one up to play with next couple of weeks.

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