T61p Hard drive problem- Can't open Disk D:

Hi, about three days ago, my laptop, T61p, it happened blue scrren error, and yesterday, it happened that I can't open the Disk D:, when I tried to open it, it said parameter uncorrect or asked me to format the disk.
Cause there are some useful files in the disk, I don't want to do that. And because I haven't backed up the system for several months, I don't know how to resuce the files in it.
Actually, this problem had happened last months, but when I restart the computer, the diskcheck runs automatically, and after that, the disk D: can be opened. But this time, the system just check the disk C:, and I can't run the "diskcheck" for Disk D:, when I insert this order in "cmd", it said the disk is raw, and can't proceed.
Can anyone help?
Many thanks!
Sean
T61p - 15.4" - T7500 - FX 570M 256MB - 2GB RAM - HITACHI 5400 160G - 4965AG - BT - FPR - 9 cell - Vista Ult. 32BIT

If you get a response that the disk is "raw", you can try the following: go into diskmgmt.msc (type it in run-dialog), and try setting a different drive-letter on the D-drive. See if that helps (reported "raw" disks in Vista/Windows 7 sometimes are just failure to recognize the disk properly, and a new drive-letter "activates" it again).
IT-technician, running my own company in Bergen, Norway
Thinkpad T61, 8895CTO C2D 2Ghz/4GB/120GB SSD/1400x1050

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