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 paper 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:

  .techreport	pb:13:sdtr
  author		J. S. Plank and M. Blaum
  title		Sector-Disk (SD) Erasure Codes for Mixed Failure Modes in RAID Systems
  institution     University of Tennessee
  month           May
  year            2013
  number          CS-13-708
  where		http://web.eecs.utk.edu/~jplank/plank/papers/CS-13-708.html
  

• Bibtex:

  @TECHREPORT{pb:13:sdtr,
  	author = "J. S. Plank and M. Blaum",
  	title = "Sector-Disk ({SD}) Erasure Codes for Mixed Failure Modes in {RAID} Systems",
  	institution = "University of Tennessee",
  	month = "May",
  	year = "2013",
  	number = "CS-13-708",
  	where = "http://web.eecs.utk.edu/~jplank/plank/papers/CS-13-708.html"
  }