HP Smart Array 6i Controller and 128MB BBWC User Manual
Page 44
44
HP Smart Array 6i Controller User Guide
When the array has more than two physical drives, drives are mirrored in pairs.
In each mirrored pair, the physical drive that is not busy answering other requests
answers any read requests that are sent to the array. (This behavior is called load
balancing.) If a physical drive fails, the remaining drive in the mirrored pair can
still provide all the necessary data. Several drives in the array can fail without
incurring data loss, as long as no two failed drives belong to the same mirrored
pair.
This fault-tolerance method is useful when high performance and data protection
are more important than the cost of physical drives.
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