Inaccessible Hard Drive

I have reformatted my PC, I backed up everything I needed up to my primary slave hard drive. After reinstalling Windows I need to "format" my D: (slave) to access it. I need to access the information in the drive, its crucial, is there any possible way to access it?

P.S. My drive is 300gb and in Windows it says it is at only 128gb capacity. This is impossible. Why and is this possible the answer to the previous question?

P.S.S. Here is my other problem that is tied into this: http://www.experts-exchange.com/Hardware/Q_21733696.html
k0mPl3xXAsked:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Assuming the 300 GB drive was seen properly before, your BIOS supports it.  In which case, the problem is most likely that you haven't applied a service pack.  Windows XP needs SP1 or later to see the full capacity of drives (which the BIOS sees correctly) if they are over 128 GB.
k0mPl3xXAuthor Commented:
I am at the Microsoft Updates page and it says nothing about upgrading to any Service Pack...
Lee W, MVPTechnology and Business Process AdvisorCommented:
So do you have a Service Pack installed or not?  Or do you not know and you're trying to rely on Windowsupdate.microsoft.com to tell you?
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Here's microsoft documentation on the issue:
http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B303013
kohanseyCommented:
You will need to go to Control Panel -> System, look under the general tab to determine which service pack you have.  The latest SP for XP is SP2.  If your computer doesn't have the latest, it should be an option to download from Windows Update.  
k0mPl3xXAuthor Commented:
It says Windows XP Professional Version 2002, that's all. So I'm assuming I do not have any SPs installed and I have installed all 17 crucial Windows Updates. I need to restart my comp to see if it works.
k0mPl3xXAuthor Commented:
If SP2 is installed and the drive is recognized to its capacity, will I be able to access the files stored on it?
Lee W, MVPTechnology and Business Process AdvisorCommented:
If your computer has SP1 or 2 on it it SHOULD provide access to all your files.

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