Partial-MDS Codes and Their Application to RAID Type of Architectures

Copyright © (2013) by IEEE. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distrubuted for profit. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee.

A family of codes with a natural two-dimensional structure is presented, inspired by an application of RAID type of architectures whose units are solid state drives (SSDs). Arrays of SSDs behave differently to arrays of hard disk drives (HDDs), since hard errors in sectors are common and traditional RAID approaches (like RAID 5 or RAID 6) may be either insufficient or excessive. An efficient solution to this problem is given by the new codes presented, called partial-MDS (PMDS) codes.

By: Mario Blaum, James Lee Hafner, Steven Hetzler

Published in: IEEE Transactions on Information Theory, volume 59, (no 7), pages 4510-19 (10.1109/TIT.2013.2252395) in 2013


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