Dell iDRAC8 manual = Number of RAID sets 214

RAID Level	Data	Read	Write	Rebuild	Minimum	Suggested
	Availability	Performanc	Performanc	Performanc	Disks	Uses
		e	e	e	Required
						logs, and
						critical
						information.
RAID 5	Good	Sequential	Fair, unless	Fair	N + 1 (N = at	Databases
		reads: good.	using		least two	and other
		Transactiona	writeback		disks)	read
		l reads: Very	cache			intensive
		good				transactional
						uses.
RAID 10	Excellent	Very Good	Fair	Good	2N x X	Data
						intensive
						environment
						s (large
						records).
RAID 50	Good	Very Good	Fair	Fair	N + 2 (N = at	Medium
					least 4)	sized
						transactional
						or data
						intensive
						uses.
RAID 6	Excellent	Sequential	Fair, unless	Poor	N + 2 (N = at	Critical
		reads: good.	using		least two	information.
		Transactiona	writeback		disks)	Databases
		l reads: Very	cache			and other
		good				read
						intensive
						transactional
						uses.
RAID 60	Excellent	Very Good	Fair	Poor	X x (N + 2) (N	Critical
					= at least 2)	information.
						Medium
						sized
						transactional
						or data
						intensive
						uses.
N = Number of physical disks
X = Number of RAID sets

214