Hard disk does not appear in the RAID1 app

sevenforums.com/hardware-devices/  internal-hard-drive-not-recognized
I suspect the problem is that the 1TB drive was formatted in XP. Read this rather lengthy discours about the possible problem. I would reformat it with Partition Wizard bootable CD.
-------------------------------
Did a full Win 7 format and no luck.
Downloaded and used active@ killdisk hard drive eraser, and then the disk is now good to go.
The Intel Matrix Storage Raid Manager now shows the drive as a "non-raid disk" at start-up, rather than an "off-line member", which was probably the cause of the problem!

diskdoctors.com/new-internal-hard-drive-is-not-recognized-by-my-pc

1. Click on the Start
2. Right click on Computer and select Properties.
3. Then select the Device Manager which is displayed at the upper left corner of the screen.
4. Now, click the little triangle and explore the category of Disk Drive.
5. Right click on your specific drive and select Properties.
6. Navigate to the Policies tab.
7. If you find an option of Optimize for Quick Removal or something similar to it, then uncheck that option or turn it off.

neoseeker.com/forums/  windows-7-doesn-recognize-hard-drive
Computer Management (Local) - Storage - Disk Management
on the bottom half of the screen does your RAID setup show? Might be listed as RAW or Unallocated.
If it shows up, it either needs formatting and/or a drive letter assigning.
If it doesn't appear, then being a new install of Windows 7 you're probably just lacking the RAID drivers to see it.