Formal Modeling and Analysis of a Flash Filesystem in Alloy

  • Eunsuk Kang
  • Daniel Jackson
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5238)

Abstract

This paper describes the formal modeling and analysis of a design for a flash-based filesystem in Alloy. We model the basic operations of a filesystem as well as features that are crucial to NAND flash hardware, such as wear-leveling and erase-unit reclamation. In addition, we address the issue of fault tolerance by modeling a mechanism for recovery from interrupted filesystem operations due to unexpected power loss. We analyze the correctness of our flash filesystem model by checking trace inclusion against a POSIX-compliant abstract filesystem, in which a file is modeled simply as an array of data elements. The analysis is fully automatic and complete within a finite scope.

Keywords

Fault Tolerance Alloy Analyzer Page Size NAND Flash Software Repository 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Eunsuk Kang
    • 1
  • Daniel Jackson
    • 1
  1. 1.Computer Science and Artificial Intelligence LaboratoryMassachusetts Institute of TechnologyCambridgeU.S.A

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