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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