I had a problem recently with an IDE hard drive formatted with a single NTFS partition, that used to sit in a Windows 2000 machine. Having installed XP-64-bit on a new machine, I then plugged this IDE drive in, powered the computer up and proceeded to let XP install what it needed to support the drive. When it had done, the NTFS partition wasn't accessible. Worse, the Logical Disk Manager reported the drive as being 'Dynamic' (as opposed to 'basic' which a drive usually is), and that it couldn't activate the NTFS partition as therer were 'no valid configuration copies found'.
I then went looking for a partition tool that could help me find out what was going wrong. In the end I found an ISO for a bootable CD, called the Ultimate Boot CD, and this contained loads and loads of system inspection and recovery tools. Some tools are demo, but a fair few are full-featured and free; naturally, use them at your own risk!
For this particular problem, none of the disk recovery tools were any use. None of the tools I tried from the manufacturers (Western Digital, Seagate, etc) would analyse/edit the partitions; only concerned with the physical integrity of the disk. As for the filesystem tools, I tried these two :
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