Dell 3 - Manual (Page 53)

RAID Levels 51
RAID 50 can sustain one to four drive failures while maintaining data
integrity if each failed disk is in a different RAID 5 array.
Table 3-6 provides an overview of RAID 50.
Ta b l e 3 - 6 . R A I D 5 0 O v e r v i e w
Uses RAID 50 works best when used with data that requires
high reliability, high request rates, and high data
transfer and medium to large capacity.
Strong Points RAID 50 provides high data throughput, data
redundancy, and very good performance.
Weak Points Requires 2 to 4 times as many parity drives as RAID 5.
Drives 6 to 256 (Eight arrays x 32 stripes = 256 drives)