|Unfortunately sometimes a second hard drive can be configured as a Dynamic disk. This is basically an extension of the primary disk. This means that the file system for that Dynamic disk is lost when the primary is reworked. |
This is just a guess at this point.
You may have a different issue. Just thought I should point out the possibilities.
After the restore did you need to re-apply SP2? Was the restore to WinXP original?
Some things to try.
See if you can take ownership of the files/folders. Look at the link below to learn how.
Run chkdsk on that disk.
Run testdisk on that disk.