Affiliation:
1. University of Tennessee
2. IBM Almaden Research Center
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.
Funder
National Science Foundation
Division of Computer and Network Systems
International Business Machines Corporation
Publisher
Association for Computing Machinery (ACM)
Subject
Hardware and Architecture
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