Is the RAID configured thru your motherboard bios or is it a Windows Software configured RAID? If motherboard configured, what is the make/model # of motherboard?
I had a similar SMART failure like you describe that doesnt show all the time and it was with 2 500GB Maxtor SATA drives that I was using also as RAID 1. Because I was running RAID 1 as exact mirror I ended up just running them until the one that failed died for good... such as it wouldnt spin up. In the end I found out that the early Maxtor 500GB SATA drives ran hot even idling, and the problem was that sandwiched together in the case there was a heat build up and that was the cause for the SMART failures which lead to the 1 of 2 drives crashing. I also would hear strange noises coming from my tower a day or so before that 1 drive died for good. Sounded like a metallic ping noise, which when I opened the case was coming from one of the 2 at the time that I wasnt able to distinguish. When that drive died it was burning hot as well as the other same drive next to it. Felt like you could roast an egg on it. Ended up decomissioning this 500GB drive as a vital drive and retired it to occasional external drive usage for moving large files between systems. And with the 500GB that roasted, Maxtor's warranty expired on it, but when Seagate bought out Maxtor, Seagates warranty then applied to Maxtor products with longer replacement warranty and so I shipped it back for a brand new Seagate Refurb 500GB that is almost 1/2 as thick as the other drive and runs cool and quiet.
