ServeTheHome have a RAID Reliability Calculator available.
ServeTheHome have a RAID Reliability Calculator which is a simple Simple MTTDL (Mean Time to Data Loss) Model:
“Simply put, this calculator will give you a fairly good idea regarding which RAID level is the most reliable given a number of drives. Also, if you do not believe manufacturer numbers, you can add things such as your own mean time between failure (MTBF) figures.”
If this is off interest to you, then you can find it here.
NOTE: This tool is currently in beta and feedback is appreciated
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