I would like to run freenas on a HP P410 hardware RAID 5 4x600GB 15k SAS array and be alerted in the case of physical disk failure, however the noreferrer">freenas documentation says: to prevent problems, do not enable the S.M.A.R.T. service if your disks are controlled by a RAID controller as it is the job of the controller to monitor S.M.A.R.T. and mark drives as Predictive Failure when they trip. As the machine is installed in a lights-out data center, there's no way for the controller to alert anyone of RAID array being degraded. S.M.A.R.T. would appear to be an option - perhaps a physical disk failure would show as a high "Reallocated Sectors Count" at the array level? Notes: Other options I have considered, but rejected are: Using a dumb HP H220 HBA with RAID-Z ( guaranteed) or RAID 10 (1....