Date: Thu, 17 May 2012 14:10:34 +0200 From: Grzegorz Bernacki <gjb@semihalf.com> To: freebsd-fs@freebsd.org, freebsd-embedded@FreeBSD.org, freebsd-arm@freebsd.org Subject: NAND Framework in HEAD. Message-ID: <4FB4EABA.702@semihalf.com>
next in thread | raw e-mail | index | archive | help
Hello,
I would like to annouce merging of the project/nand branch into HEAD.
The purpose of this project was to create a complete environment
supportng NAND Flash devices in FreeBSD.
The NAND Flash environment consists of a driver framework for NAND
controllers and memory chips, a NAND device simulator and a fault
tolerant, log-structured file system (NANDFS), tailored to meet the
unique challenges of NAND flash storage. The package includes all the
tools, utilities and documentation needed to deploy this technology in
custom applications.
The NAND Flash environment consists of several distinct components:
- NAND framework (drivers harness for NAND controllers and NAND chips)
- NAND simulator (NANDsim)
- NAND file system (NAND FS)
- Companion tools and utilities
- Documentation (manual pages)
NAND FS adopts log-structured approach and some parts of its internal
design are derived from the new implementation of the log-structured
file system (NILFS), with some concepts rooting in the original (now
legacy) BSD log-structured file system (LFS).
The NAND FS has the following major features:
- Hard links
- Symbolic links
- Case-sensitive, case-preserving
- Snapshots
– No limit on the number of snapshots (only volume-limited)
– Mountable as read-only file systems
– Simultaneously mountable (there can be a writable mount concurrently
mixed with a number of read-only snapshots)
- Redundant super block
- Metadata
– POSIX file permissions
– Creation timestamps
– Last content modification timestamps
– Last metadata change timestamps
– Checksum / ECC
Additional documentation related to project can be found at:
http://wiki.semihalf.com/moin.cgi/FreeBSD/NAND
The NAND Flash Framework was developed by Semihalf. Juniper Networks and
the FreeBSD Foundation kindly sponsored releasing the code to the
FreeBSD community.
regards,
grzesiek
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4FB4EABA.702>