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Running Lion with Windows 7 boot camped, I modified my Mac OS X partition and reduced its size by 100 GB. I formatted the new 100Gb to FAT 32.

When I restarted my computer, I received the "No bootable device -- insert boot disk and press any key" error. I restarted and logged into Lion and the Startup Disk utility still recognized the boot camp install but I still couldn't restart into Windows. I was still able to see the content of the files in the Boot Camp partition via Finder. I tried running from Windows 7 DVD and repairing, but Windows repair didn't recognize any installs.

In the Disk Utility, I deleted the new partition I created (100gb). After deleting it, I noticed the boot camp partition's name changed to disk0s4 and was marked as FAT 32 format. Now I can't look at the boot camp files in finder and startup disk utility isn't recognizing the boot camp partition.

How can I fix the boot camp boot loader, or ay least access my files from lion?

Update: The default boot is going to the Windows partition but it shows the "No bootable device -- insert boot disk and press any key" error. I assume that means the partition is still good?

Update 2: I ran Windows 7 install via a DVD and got to the point where it shows you a list of drives/partitions available. It showed me the boot camp partition (I recognized it by the partition size, although it was about 15 GB short of what I expected) as being "RAW" format with all space being empty. sad face

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Don't change any partitions after instaling Windows 7 Bootcamp, otherwise Windows 7 won't work.

  • So in other words, if the partition sizes you choose initially are not optimal, you need to redo the entire boot camp install? – Jordan Sep 9 '14 at 3:00
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As I suspected, the files were still fine but some bad things happened to the boot sectors.

I ended up running TestDisk to copy all the files to an external hard drive, but it wasn't able to fix the boot sectors.

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I have experienced the same problem too, and found this thread in search for an answer.

Now I finally I know why - my internal dvd but it is not longer working and I use the external or usb bootable windows 7.

I didn't use the internal dvd for some time and missed the fact that this won't work with out original iMac's dvd being operational.

I recommend you test and get your DVD hardware fixed.

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Windows 7 doesn't run on a FAT Partition. Now you need to forget your data and reinstall Windows 7 with bootcamp.

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