RAID0 Booting off the Wrong Drive

Discussion in 'Mac Basics and Help' started by lostime, Oct 13, 2009.

  1. lostime macrumors regular

    May 19, 2009
    I've searched the forums and google trying to find a solution without posting but maybe someone can help.

    Here's the situation. uMBP dual 500gb HD's (Optibay) in soft RAID0. Clean install but I guess the boot files were copied to the 2nd hard drive. When rebooting I have to hold option and select the 2nd hard drive for it to boot, if I let it go it will get to the gray screen and reboot endlessly. When I boot it from the 2nd hard drive it runs perfectly, fast and without problem. My question is how do I get it to boot from the second hard drive without me manually telling it to do so? Will a physical swap of the drives do it?

    "Startup Disk" under System preferences sees the array as one drive.
  2. BlueRevolution macrumors 603


    Jul 26, 2004
    Montreal, QC
    Try resetting the PRAM. Command+option+P+R on startup until you hear the startup chime a second time.
  3. lostime thread starter macrumors regular

    May 19, 2009
    That appears to have solved the problem, don't know why I didn't think of that but thanks.

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