Nested RAID Levels
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Levels of nested RAID, also known as hybrid RAID, combine two or more of the standard levels of RAID (redundant array of independent disks) to gain performance and/or additional redundancy. When nesting RAID levels, a RAID type that provides redundancy is typically combined with RAID 0 to boost performance. With these configurations it is preferable to have RAID 0 on top and the redundant array at the bottom, because fewer disks then need to be regenerated when a disk ...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Levels of nested RAID, also known as hybrid RAID, combine two or more of the standard levels of RAID (redundant array of independent disks) to gain performance and/or additional redundancy. When nesting RAID levels, a RAID type that provides redundancy is typically combined with RAID 0 to boost performance. With these configurations it is preferable to have RAID 0 on top and the redundant array at the bottom, because fewer disks then need to be regenerated when a disk fails. (Thus, RAID 1+0 is preferable to RAID 0+1 but the administrative advantages of "splitting the mirror" of RAID 1 would be lost. It should be noted, however, that the on-disk layout of blocks for RAID 1+0 and RAID 0+1 setups are identical so these limitations are purely in the software).
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