Block-level RAID is dead

  • Authors:
  • Raja Appuswamy;David C. van Moolenbroek;Andrew S. Tanenbaum

  • Affiliations:
  • Vrije Universiteit, Amsterdam;Vrije Universiteit, Amsterdam;Vrije Universiteit, Amsterdam

  • Venue:
  • HotStorage'10 Proceedings of the 2nd USENIX conference on Hot topics in storage and file systems
  • Year:
  • 2010

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Abstract

The common storage stack as found in most operating systems has remained unchanged for several decades. In this stack, the RAID layer operates under the file system layer, at the block abstraction level. We argue that this arrangement of layers has fatal flaws. In this paper, we highlight its main problems, and present a new storage stack arrangement that solves these problems.