How can you see the second HDD in what?
When the W2k Install crashed what happened?
Sounds like the Partition Information on the Second HDD was corrupted when the original OS crashed and you need to do something about this.
What Security did you have enabled with W2K?
You can try a Live Linux like Knoppix and boot off the CD to see if the Data Drive is actually intact or is blank you can download it from here
http://tinyurl.com/5lnzfx
Also you should test the HDD with the makers testing utility this should be a DOS utility that you can run off a floppy or if you don't have a floppy you will need to burn it to a CD and run from there. Seagate has Seatools which is a good universal testing utility but if you don't have a Seagate HDD any Fault Reports Descriptions of problems with a HDD may not be 100% correct. The Drive will be faulty if it reports as Faulty but the reason it is faulty may not be right. Seatools is available to download from here
http://tinyurl.com/yvq99t
Of course using the HDD Makers testing utility is always best.
If the Partition Information has been corrupted you need some form of Data Recovery Software to recover the Files or if you have a Backup of your Data you an just format the Drive and restore from the Backup.
Here is a short list of the better ones
http://tinyurl.com/273ay5
http://tinyurl.com/rmvrv
http://tinyurl.com/yvrsl
http://tinyurl.com/yyk8cm
http://tinyurl.com/382vm
http://tinyurl.com/ynwnel
http://tinyurl.com/nc4kx
http://tinyurl.com/2wox7l
http://tinyurl.com/374d8b
http://tinyurl.com/djw6u
http://tinyurl.com/f73se
http://tinyurl.com/8bd3f
http://tinyurl.com/afu2j
While the last 2 are from the same company they are very different products. Win Hex should only be considered foe use by someone who knows Hex Inside Out while Davory is a great cheap General Purpose Application.
Personally I prefer the On Track Option but it's anything but cheap. However because I use this type of software a lot it's paid for itself many times over by now, for a cheaper option Spin Rite from Gibson Research or Stella have both very good reputations by other TR members.
Col