SATA not detected by Windows 7

Hey there,

I recently bought two new sata3 drives and set them up in a raid stripe and installed win7, all work fine.
I added an older sata2 drive, it shows in the bios but Windows 7 cant see the drive.. not in disc management or device manager...

I had a similar problem with my other sata2 drive but that one showed up in device manager as a 'scsi' and after a few reboots suddenly showed up in disc man. but after disconnecting that to try the other drive its now got the same problem.

any ideas??
 
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