Dell POWEREDGE RADI H800 - Manual (Page 28)

Dell
DELL PERC H700 and H800 Technical Guide 28
Figure 10. Example of RAID 60 (6 + 0)
Advantages of RAID 60

Allows creation of largest RAID groups, up to 256 drives (theoretical); large RAID volumes are
allowed for up to 192 drives connected to PERC H800

High degree of fault tolerance due to 2 parity calculations being done for each RAID 6 subset

Medium-to-high write transaction rate
Disadvantages of RAID 60

One of the more complex RAID implementations

Less space-efficient than RAID 6 since separate parity calculations are done for each RAID 6
subset

Retrieval of parity information after a drive failure takes longer than using a mirrored solution
Drive 1 Drive 2 Drive 3 Drive 5 Drive 6 Drive 7
Parity
Generation
Data 1 Q parity
P parity
P parity
P parity
P parity
Parity
Generation
RAID 0
RAID 6 RAID 6
Q parity
Q parity
P parity
Q parity
P parity
Drive 4
Q parity
P parity
Q parity
Q parity
Q parity
P parity
Drive 8
Data 2 Data 3 Data 4
Data 5 Data 6 Data 8
Data 10
Data 7
Data 15
Data 9
Data 16
Data 11 Data 12
Data 13 Data 14