Mac Cannot see Windows HDD Partition/ Windows cannot reformat disc?

I have installed boot camp and windows 7 64 bit on my mac pro dual quad core.
I have 3 drives.
#1 is 1 TB and partitioned in 2 logical drives so that one is windows NTFS and one is Mac. The mac OS does not see the windows drive. In fact it appears in disk manager as UNMOUNTED and FAT when in fact its NTFS.
#2 is the drive that shipped with the mac, partitioned into 2 drives, one which boots windows (bootcamp) and 1 boots OS X. No problems.
The problem is drive #1 holds all my vido from my camcorder so I need the mac to recognize the windows drive and read the data. I copied all the data off of the NTFS partition and tried to format it in Windows. Windows says its "in use". It is not in use since Windows boots from BOOTCAMP on a different physical drive. It won't let me ignore the error, if I try it waits a few seconds and repeats the error.
I tried to erase the partion in disk manager, same issues. Even after the mac erases it into any format (Mac, Fat32, etc...), the Windows disk console will resfuse to format it claiming that its "in use".
Any ideas?
Anyone else have the same problem? I think it has to do with the hidden 200 MB partitions that windows 7 creates and that the MAC may unintenionally mess with.

DIngo Dave 69 wrote:
I am running Snow Leopard and on my seperate windows 7 machine I can see and connect to my mac. However I cannot get the Mac to connect to the Windows 7 machine. Even home sharing is not working on itunes.
Can anyone help?
Maybe
On the Win7 machine,
1. Ignore everything to do with Homegroup.
2. Go > Computer > Users > User; right click on User and chose Share with > Specific people; and Set to share with a specific individual or Everyone—both with Read/Write permission.
3. Go Control Panel > Network and Sharing Options > Advanced sharing Settings, and Turn on network discovery, Turn on file and printer sharing, Turn off public folder sharing , and Turn off password protected sharing (unless sharing won’t occur without turning it on).
4. Restart (probably not necessary, but I’d do it).
On the Sno machine,
1. Go System Preferences > Sharing > Check File sharing > Go Options > Enable SMB sharing.
2. Go System Preferences > Network > Select Airport or Ethernet depending on what you are going to be using. I am assuming you will be using wireless below. Let me know if not true.
3. Having selected Airport, select ask to join new networks and show Airport status in menu bar.
4. Click advanced > click remember networks this computer has joined > Click Wins > Enter the ip address of your Win7 machine in the WINS server box > Enter the Win7's workgroup name in the workbook box unless it already is there (look in the drop down menu too). In all likelihood the name is workgroup, but check on the Win7 machine.
5. Restart (probably not necessary, but I’d do it).
Try to connect to your Win7. Use Go menu > Connect to server. In trying to connect, type smb://ipaddress (of the Win7 machine). If, for some reason, you are asked to, input a user name and password, then use you user name and password for the Win7. Don't save anything to Keychain now and actually never for making network connections.

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