Tried setting up a software raid in windows 7 using 2 new seagate 1TB disks (from Newegg). Have never tried Seagate usually have used WD 1TB caviar black... Worked for two days, then today when I got home the drive letter was gone. Took out the HD's, plugged into a USB HD dock and one of them showed as "invalid". Was able to get it back, ran a few checks in windows (in computer management) and it seems OK. Set up the raid again deleting volumes etc per http://www.howtogeek.com/howto/36504/how-to-create-a-software-raid-array-in-windows-7/ Is it typical to have a failure like this or do I possibly have a bad disk? Thanks in advance for any help/advice as I know just enough to be dangerous (apparently).