I can see the drive but not the data



Please help. I have a WD My Book Studio Edition ii. My OS is XP pro 64x. I have set it to Raid 1. I had no problem for about a year. I was booting windows when the OS did a check on one of the drives (I have 3). Since then I can see the drive on windows including the mapping letter and I can even open it, but there is no data. In windows you can see it has data on it as it shows the total size and free space. I have even tried to connect both drives separately to a sata cable inside the computer, but I have the same result.

Any suggestions