You are setting up a RAID system in a server designed for optimum fault tolerance, accuracy, and minimal downtime. Which HDD

is best for this system, assuming the motherboard supports it$?$

Hot$-$swap $2\mathrm{.}5$ SATA $2\mathrm{.}0$ SSD

Hot$-$swap $3\mathrm{.}5$ SATA $3\mathrm{.}010,000-$RPM drive

$3\mathrm{.}5$ SATA $3\mathrm{.}015,000-$RPM drive

$2\mathrm{.}5$ SATA $6$ Gb$/$s SSD