October 2021
Intermediate to advanced
746 pages
44h 42m
English
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Chapter 11: Hierarchical RAID - HRAID
Abstract
HRAID is motivated by the storage bricks paradigm. Each Storage Node - SN has a controller implementing the intranode erasure code over SN's disks. HRAID uses a multilevel RAID paradigm with internode erasure coding. Disk failures can be handled by intra-node redundancy firstly and internode redundancy secondly. Internode coding can handle SN failures. Nodes may be provided with higher levels of redundancy RAID
greater than zero. Disk failures are handled by restriping at each node, i.e., overwriting check strips with data strips from the failed disk. A baseline array with no interdisk redundancy ...
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