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Title: Chfs  
Author: World Heritage Encyclopedia
Language: English
Subject: Boot File System, Journaling file system, UBIFS, Advanced Disc Filing System, Dell Fluid File System
Publisher: World Heritage Encyclopedia


Developer University of Szeged
Full name Chip File System
Introduced 2011 (NetBSD 6.0)
Directory contents Red–black trees
File system permissions POSIX
Supported operating systems NetBSD

CHFS is a file system developed at the Department of Software Engineering, University of Szeged, Hungary.[1] It's the first open source Flash memory-specific file system written for the NetBSD operating system.


Similar to UBIFS, the CHFS file system utilizes a separate layer for handling Flash aging and bad blocks, called EBH (erase block handler). The file system itself is modelled after JFFS2, thus the internal structure is very similar.


CHFS was originally called ChewieFS during development. The name was changed to avoid legal issues and to have a more neutral name.

See also


  1. ^ "Intromail". Retrieved February 4, 2012. 

External links

  • Project page
  • BSD-Day 2010 Presentation
  • First official introduction mail
  • mount_chfs manpage

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