Unused Disk after new Windows 7 Install

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I have a really big problem.I currently had 2 hard drives, disk0 and disk1. I bought a Western Digital 1TB hard-disk a while ago and installed it on Windows 8 and it was placed as my disk 2.

I put all my data from long time ago in it and used it for about 5 months.

It was all fine 10 hours ago when I decided to install Windows 7 (in place of Windows 8). I formatted disk1 entirely (didn’t mess anything with disk0 and disk2) and successfully installed Windows 7.

After the process was done I started Windows 7. The problem is that I noticed that Windows 7 doesn’t seem to be able to deal with disk2 (1TB WD Hard Disk). Windows 7 can see it in Disk Management but doesn’t even recognize the Free Space and the Used Space (should be 470gb used).

I can’t even assign a letter to it, the only option I have is to Delete it. I tried many others software and they do the same, they partly recognize the 1TB hard drive, but doesn’t seem to able to detect free-space and used space. They also seem not to be able to do anything with it but to able to delete it. Also, I noticed it probably is in some GPT Format.

I’m pretty sure I didn’t do anything wrong with this disk in the Windows 7 installation process, and I didn’t format it.

The data I have on it is really important and I can’t afford to lose it. While all evidence points to the fact that the data is still there, I still have a lot of fear that the data is all gone.

What should I do?

To clarify more, here is the print screens from various programs :






Recover the partitions using TestDisk.

For some reason, it sounds like your system is having trouble reading a GPT disk. I’m guessing you see one large partition, and don’t recognize it? You can read about this in this Windows and GPT FAQ

Win7 should have support for GPT, so this sounds very strange. Perhaps you used an MBR-only tool on the GPT disk that may have affected things?

In any case, I would try and create a sector-by-sector clone of the disk first, then maybe try a tool that can convert MBR to GPT. I haven’t used that particular product, but it sounds like it might get the job done.

You might also try a linux rescue disk and GPT fdisk. There’s a good section on that page about repairing GPT disks.

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