Why does my internal disk drive turn from NTFS to RAW?

Foad Adnani December 2, 2012
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I have a 500GB internal hard disk formatted to NTFS which for some reason sometimes appears as RAW. Here is a screenshot of what shows up when Windows reports RAW instead of NTFS:

When this happens the files still on disk are still ok, but I have to fix it using Parted Magic. I run the software from the boot menu, the software repairs everything. Then I reboot the PC, start Windows 7 and the disk is back to NTFS.

But still, this happens again and I have to repair it all over again. What might cause this and how can I sort it out?

 

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