Sector-Disk (SD) Erasure Codes for Mixed Failure Modes in RAID Systems

James S. Plank, EECS Department, University of Tennessee,
Mario Blaum. IBM Almaden Research Center

ACM Transactions on Storage (TOS), Volume 10, Issue 1, January, 2014.

Abstract

Traditionally, when storage systems employ erasure codes, they are designed to tolerate the failures of entire disks. However, the most common types of failures are latent sector failures, which only affect individual disk sectors, and block failures which arise through wear on SSD's. This article introduces SD codes, which are designed to tolerate combinations of disk and sector failures. As such, they consume far less storage resources than traditional erasure codes. We specify the codes with enough detail for the storage practitioner to employ them, discuss their practical properties, and detail an open-source implementation.

Citation Information

Plain Text:

.article        pb:14:sd
author          J. S. Plank and M. Blaum
title           Sector-Disk ({SD}) Erasure Codes for Mixed Failure Modes in {RAID} Systems
journal         ACM Transactions on Storage
volume          10
number          1
month           January
year            2014
where           http://dl.acm.org/citation.cfm?id=2560013&CFID=289178060&CFTOKEN=99239128
doi             10.1145/2560013

Bibtex:

@ARTICLE{pb:14:sd,
        author = "J. S. Plank and M. Blaum",
        title = "Sector-Disk ({SD}) Erasure Codes for Mixed Failure Modes in {RAID} Systems",
        journal = "ACM Transactions on Storage",
        volume = "10",
        number = "1",
        month = "January",
        year = "2014",
        where = "http://dl.acm.org/citation.cfm?id=2560013&CFID=289178060&CFTOKEN=99239128",
        doi = "10.1145/2560013"
}