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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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Содержание MR Gen10 Plus
Страница 1: ...HPE MR Gen10 Plus Controller User Guide Part Number 30 9E6EB4E3 002 Published April 2022 Edition 2 ...
Страница 10: ...Features Features 10 ...
Страница 19: ...RAID technologies RAID technologies 19 ...
Страница 26: ...Striping Striping 26 ...
Страница 28: ...Mirroring Mirroring 28 ...
Страница 32: ...Parity Parity 32 ...
Страница 45: ...Spare drives Spare drives 45 ...
Страница 50: ...Transformation Transformation 50 ...
Страница 51: ...Array transformations Array transformations 51 ...
Страница 54: ...Logical drive transformations Logical drive transformations 54 ...
Страница 58: ...Drive technology Drive technology 58 ...
Страница 66: ...Security Security 66 ...
Страница 68: ...Simple A Simple erase writes a pattern to the logical drive in a single pass Simple 68 ...
Страница 70: ...Thorough A thorough drive erase operation repeats the Normal drive erase operation three times Thorough 70 ...
Страница 73: ...Reliability Reliability 73 ...
Страница 76: ...Performance Performance 76 ...
Страница 80: ...Cache Cache 80 ...
Страница 97: ...Cable part numbers For more information on cables see the server QuickSpecs Cable part numbers 97 ...
Страница 98: ...Configuration Configuration 98 ...
Страница 106: ...Configuration management Configuration management 106 ...
Страница 117: ...Controller management Controller management 117 ...
Страница 119: ...Advanced controller management Advanced controller management 119 ...
Страница 137: ...Logical drive management Logical drive management 137 ...
Страница 143: ...Drive management Drive management 143 ...
Страница 155: ...Maintenance Maintenance 155 ...
Страница 156: ...System maintenance tools System maintenance tools 156 ...
Страница 160: ...Models Models 160 ...
Страница 172: ...Support and other resources Support and other resources 172 ...