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RAID 5
RAID 5
RAID 5 protects data using parity (denoted by Px,y in the figure). Parity data is calculated by summing (XOR) the data from each drive
within the stripe. The strips of parity data are distributed evenly over every physical drive within the logical drive. When a physical
drive fails, data that was on the failed drive can be recovered from the remaining parity data and user data on the other drives in the
array. The usable capacity is C x (n - 1) where C is the drive capacity with n drives in the array. A minimum of three drives is required.
The maximum number of drives supported for RAID 5 is 32.
This method has the following benefits:
It is useful when usable capacity, write performance, and data protection are equally important.
It has the highest usable capacity of any fault-tolerant configuration.
Data is not lost if one physical drive fails.
RAID 5
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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 ...