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Selecting RAID for usable capacity
Selecting RAID for usable capacity
If your environment requires a high usable capacity, select a RAID type that is optimized for usable capacity. The chart in this section
demonstrates the relationship between the number of drives in the array and the percent usable capacity over the capacity for RAID 0.
Consider the following points when selecting the RAID type:
Usable capacity decreases as fault tolerance improves due to an increase in parity data.
The usable capacity for RAID 10 remains flat with larger arrays.
The usable capacity for RAID 5, 50, 6, and 60 increases with larger arrays.
RAID 50 and RAID 60 assumes two parity groups.
Note the minimum drive requirements for the RAID types, as shown in the table below.
RAID type
RAID type
Minimum number of drives
Minimum number of drives
RAID 0
1
RAID 10
2
RAID 5
3
RAID 6
4
RAID 50
6
RAID 60
8
Supported RAID levels may vary based on the controller model.
Selecting RAID for usable capacity
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Summary of Contents for MR Gen10 Plus
Page 10: ...Features Features 10 ...
Page 19: ...RAID technologies RAID technologies 19 ...
Page 26: ...Striping Striping 26 ...
Page 28: ...Mirroring Mirroring 28 ...
Page 32: ...Parity Parity 32 ...
Page 45: ...Spare drives Spare drives 45 ...
Page 50: ...Transformation Transformation 50 ...
Page 51: ...Array transformations Array transformations 51 ...
Page 54: ...Logical drive transformations Logical drive transformations 54 ...
Page 58: ...Drive technology Drive technology 58 ...
Page 66: ...Security Security 66 ...
Page 68: ...Simple A Simple erase writes a pattern to the logical drive in a single pass Simple 68 ...
Page 73: ...Reliability Reliability 73 ...
Page 76: ...Performance Performance 76 ...
Page 80: ...Cache Cache 80 ...
Page 98: ...Configuration Configuration 98 ...
Page 106: ...Configuration management Configuration management 106 ...
Page 117: ...Controller management Controller management 117 ...
Page 119: ...Advanced controller management Advanced controller management 119 ...
Page 137: ...Logical drive management Logical drive management 137 ...
Page 143: ...Drive management Drive management 143 ...
Page 155: ...Maintenance Maintenance 155 ...
Page 156: ...System maintenance tools System maintenance tools 156 ...
Page 160: ...Models Models 160 ...
Page 172: ...Support and other resources Support and other resources 172 ...