Galaxy Metal Gear 65 manual Array Basics

				Array Basics
Table 1–2	Comparing RAID levels (Continued)
RAID Level	Min No. of
	Drives	Description	Strengths	Weaknesses
RAID 10	4	Combination of RAID 0	Highest performance and	High redundancy cost overhead;
(Also known		(data striping) and RAID	data protection (can tolerate	because all data is duplicated,
as mirrored)		1 (mirroring)	multiple drive failures)	twice the storage capacity is
				required; requires minimum of
				four drives
Volume Sets	1	Non-RAID, non-striped	Ability to use a single drive to	Not protected, lower performance
		mapping to a single	store additional data	(not striped)
		drive (similar to JBOD)

A.3 Mixing Disks from Different Manufacturers or with Different Capacities

An array can contain disks with different capacities; for example, an array can include a 36-GB disk and a 72-GB disk. If you mix disks with different capacities, the smallest disk determines the logical capacity of all other disks in the array, regardless of RAID level. For example, if a RAID 0 array contains one 36- GB disk and four 72-GB disks, the capacity of the array is equivalent to approximately five 36-GB disks. To maximize disk capacity, use disks of similar size.

Important The manufacturer does not support mixing of different models, or manufacturer’s, of drives in the same enclosure.

93