RAID 0 Strip Set not Booting iMac i7 (2xSSD)

Discussion in 'iMac' started by symbology, Sep 20, 2010.

  1. symbology macrumors regular

    Aug 4, 2010
    So, I put my two SSD's in and since I was having a problem with the non-boot disk dropping off when in sleep mode (See Here) I decided to put the two disks in Raid 0 and see what happens.

    Well, I am not able to get the Raid 0 disk to boot. I can read it and it is mounted when I boot into the original 1TB HD, but the OS does not load when trying to boot from the raid set. I tried to reboot and use the "option" key and the raid disk shows up, but when I try to boot from it I get a failure every time.

    OEM HD in stock location
    SSD #1 in SSD location next to stock HD
    SSD #2 in Optical Bay
    I am using SuperDuper for disk cloning.

    When the SSD's were not in a raid set, I could boot from either one.

    Any ideas as to what the issue is?
  2. Hellhammer Moderator


    Staff Member

    Dec 10, 2008
    Try doing a clean install of OS X to the RAIDed SSDs
  3. symbology thread starter macrumors regular

    Aug 4, 2010
    Yeah, I was thinking of giving that a try. I will try that tonight when I get home. Thanks...
  4. wirelessness macrumors 6502

    Jun 20, 2010
    I assume you used Disk Utility to create the RAID set. This should work fine. I would try a clean install as mentioned above. Or use a third party tool to view the partitions. It's possible the partition table is messed up. I use gparted or parted magic live cd to view and or create aligned partitions just to be sure.
  5. symbology thread starter macrumors regular

    Aug 4, 2010
    Yes, it is an OS software raid setup using Diskutil
  6. symbology thread starter macrumors regular

    Aug 4, 2010
    So, a fresh install did the trick. It actually just fixed the system as all my installed apps and settings are still in place.

    Thanks guys......
  7. digitalhen macrumors regular

    Jan 10, 2006

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