OSX Lion won't boot after Bootcamp installation interrupted

Hello, I started a Bootcamp installation on my OSX Lion Mac Pro. Once I realized that I could only use Windows 7, I had to hold off on the installation until I located my Windows 7 disk. I had set the Bootcamp partition size to 100 GB on a 500 GB Drive. Due to threatning weather, I shutdown the computer.
Now the OSX Lion does not boot! I have been reading much information on this topic to see about fixing the problem. I talked to Apple Support and so far it is still not working. I was able to boot using the recovery partition "Disk Utility -> First Aid -> Repair Disk". When I ran Repair Disk there were some errors reported and repaired, then OSX still not booting. I installed Lion on another drive using recovery and that works OK. I was hoping to install Lion on the original drive and still not disturb my data files like music, photos, etc. That volume with OSX is greyed out and does not mount. I am thinking that the GPT had been modified and since Windows was not installed on Bootcamp, there is no way to boot on the original drive /dev/disk2. I read about a backup GPT, so I am wondering if I can use the backup GPT to fix the boot problem.
Thoughts?
Thanks,
David

Thanks for the fast reply. Ill try this again. Did this the first time, but wouldn't boot again. I've since done a,fresh install of Lion, and it created the proper recovery partition. I didn't have this before, because I cloned my old drive, when I upgraded to an SSD drive. Didn't know about the recover partition. Ill try again, and see if I can get it to work.
Just need to figure out the driver situation, with my Nvidia Quadro Mac video. Not worth trying again, if I have to use default generic video drivers.

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Thanks for the fast reply. Ill try this again. Did this the first time, but wouldn't boot again. I've since done a,fresh install of Lion, and it created the proper recovery partition. I didn't have this before, because I cloned my old drive, when I upgraded to an SSD drive. Didn't know about the recover partition. Ill try again, and see if I can get it to work.
Just need to figure out the driver situation, with my Nvidia Quadro Mac video. Not worth trying again, if I have to use default generic video drivers.

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Worst comes to worst, I've got to take it in.
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It wouldn't be much of a lock if you could circumvent it with advice from a forum.
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Got it! Not sure if removing Sophos had anything to do with it but here's what I did.
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Hello, I started a Bootcamp installation on my OSX Lion Mac Pro. Once I realized that I could only use Windows 7, I had to hold off on the installation until I located my Windows 7 disk. I had set the Bootcamp partition size to 100 GB on a 500 GB Drive. Due to threatning weather, I shutdown the computer.
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Can someone please help me to repair this issue?
Thanks,
David

Apple Hardware test result:
No problems found.
GDISK output:
GPT fdisk (gdisk) version 0.8.10
Partition table scan:
MBR: hybrid
BSD: not present
APM: not present
GPT: present
Found valid GPT with hybrid MBR; using GPT.
Disk 0:: 1467339812 sectors, 699.7 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 000000D5-2857-0000-3E39-0000720B0000
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1467339778
Partitions will be aligned on 8-sector boundaries
Total free space is 5089 sectors (2.5 MiB)
Number Start (sector)    End (sector) Size      Code Name
1              40          409639 200.0 MiB EF00 EFI system partition
2          413696      977789151 466.0 GiB AF00 Macintosh HD
3      977789152      979058687 619.9 MiB AB00 Recovery HD
4      979058688      1467338751 232.8 GiB 0700 BOOTCAMP
Everything appears to be normal. I have no idea why this happens on this machine. My only other thought is that this machine was upgraded from 10.9. My last option is to wipe the machine, install 10.10 from scratch, then reinstall everything again. I dread this last option - it is usually the sign of a desperate individual (which I am).

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OSX Lion won't boot after Bootcamp installation interrupted

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