Desktop Vs Raid Edition drives

Using desktop drives under the RAID environment could result in frequent drives being dropped out of the RAID group while trying to recover bad sectors during read operations.   

Enterprise drives uses a special FW for error recovery that limits the time it takes to attempt to recover a bad sector as other drives are waiting during that process.    

Desktop drives are designed in scenarios where there is no data redundancy or other drives working in a group so it has to spend additional time to attempt to recover data.