Hard drive help... please.

[safehaven]

I recently upgraded to Win7. When I did, I took the advice I got here and abandoned my 3-disk, software based RIAD 5 array and replace it with a 500GB Barracuda 7200.12. I installed Win7 on the new drive. As a precaution, I left my old drives disconnected until I had everything up and running and I was confident that I had not forgotten anything that I might need on them.

Today, I decided it was time to bring them back on line as storage media. I plugged them in, checked the boot order in the BIOS and away I went. The system booted up fine.

TO THE POINT:
Windows immediately notified me that if found two of the drives, but not the third. I went to Explorer and 2 drives were showing. I tried to format the first one and Win7 says it cannot format it. The second formatted just fine. Restarted the system and the formatted drive is showing in Explorer, but the other is now missing and the third drive has never shown up in Explorer.

So, I checked the Device Manager and all the drives are accounted for there and showing "This device is working properly".

First, any ideas on why the device manager is telling me they are there and working properly and Explorer is only showing my one of the drives? Second, are there any suggestions on how to format them, should they be problematic?

 

[safehaven]

Ok, so I was having problems with the Disk Management in Admin Tools running stable. So, I switched my Barracuda (OS drive) to the 0Master slot on the mobo. It was in the 1Master slot. This fixed the stability issues with Disk Management.

When I view the two problematic drives in Disk Management, there are RIAD options available for both drives. So, obviously, the system is still seeing something it does not like on the HD's. There are options available for each disk though.
"New Simple Volume"
"New Spanned Volume"
"New Striped Volume"
"New Mirrored Volume"
"New RIAD 5 Volume" (This is greyed out and why I think that the old RAID is the issue)

Will one of these options solve my problem?