What is your current status on these drives? I'm working with a customer that has five Velociraptors configured in RAID 6. Drive failures aplently.... sometimes two in the same day (thank God for RAID 6). We replaced / RMAed drives for a while but have gotten to the point where I think the RAID controller (Intel SRCSASJV) is crying wolf. At this point, when a drive fails, we just rebuild it. I'm going to be on-site over the weekend to pull drives one at a time and test them with the Lifeguard Diagnostic in a 2nd system, so we'll see what comes of that.... but I've been down this road before with these drives.
This RAID controller is a SAS RAID controller which is talking SCSI to the drives. So, the error I'm getting is sense code that translates to Medium Error - Record Not Found, which seems to translate to "IDNF" in the SATA world.
As mentioned, I'll know for sure over the weekend if this is *actually* a physical drive problem, but I really didn't think so until I came across this forum posting. At this point we've replaced the RAID controller and cabling, so I feel as though those things can be ruled out. The only other possibility could be the drive enclosure, but I think that's kind of a stretch. Power is fine... server has dual PSUs connnected to a UPS. No power fluctuations or other issues are logged in the UPS.
Also, I've kept the RAID controller firmware up to date.