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I was trying to create an extra partition to get a file from the Windows side of my Macbook Air to the Mac side, and I accidentally made the disk dynamic without realizing it. I am now unable to boot to the Mac side (holding Alt to go into the system manager at startup doesn't even list the Mac partition), and the Windows side blue screens during boot (goes so quickly that it doesn't even get to the error code before restarting).

What can I do to fix the issue? I don't know how to make a bootable flash drive that a Mac will recognize, and Disk Utility (via Internet Recovery) couldn't do anything.

(cross-posted from apple.stackexchange)

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FYI: I don't believe what comes up when you hit alt/opt at boot is called the "System Manager"; you may be confusing it with the System Management Controller. –  kalaracey Mar 6 '13 at 1:07
(1) This link may be of use to you. (2) Also, please add to your question what info exactly Disk Utility gave you (was the OS X partition still there, was it greyed out, what did you do, what messages did it give you, what it said your partition layout was). (3) Also, I guess your Recovery Partition is still there, that's a start. (4) Could you please give a little list of what your partition layout was? –  kalaracey Mar 6 '13 at 1:12
(5) Did you perhaps convert your entire hard drive into a Dynamic Disk? (6) These links may be of use to you: 1 2 (7) If you are unable to recover your system, if you have another Mac, you may be able to setup your broken Mac into Target mode, so that you can get any valuable data off of it before reformatting. –  kalaracey Mar 6 '13 at 1:19

1 Answer 1

I managed to solve my problem.

  • Burned a Fedora live CD and booted my desktop to that live CD.
  • Used livecd-iso-to-disk to create a live USB, as the Macbook Air doesn't have a disc drive (had to su -c 'yum install livecd-tools' first, then used the command su -c "--format --reset-mbr --efi /run/initramfs/livedev /dev/sdb")
  • Opened the boot menu by holding alt/option as the computer booted, then selected the EFI Boot option, which booted from the flash drive
  • Once in the Fedora, I downloaded TestDisk and ran it according to these instructions (important to note, however, that I had to select EFI GPT as the partition table type, not the Intel that was detected by TestDisk). It immediately picked up all of the partitions, then I hit enter, then hit write. After rebooting, everything was back to normal, and, as an added bonus, my extra partition functions as intended.
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