Be File System

Short description: Native file system of the BeOS operating system

BFSDeveloper(s)| Be Inc.

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Full name| Be File System
Introduced| May 10, 1997; 28 years ago (1997-05-10) with BeOS Advanced Access Preview Release[1]
Partition identifier| Be_BFS (Apple)
0xEB (MBR)
42465331-3BA3-10F1-802A-4861696B7521 (GPT)
Structures
Directory contents| B+ tree[2]
File allocation| inodes
Bad blocks| inodes
Limits
Max. volume size| ~2 EB *
Max. file size| ~260 GB *
Max. number of files| Unlimited
Max. filename length| 255 characters
Allowed characters in filenames| All UTF-8 but "/"
Features
Dates recorded| Access, Creation, Modified
Date range| Unknown
Date resolution| 1s
Forks| Yes
File system permissions| Unix permissions, POSIX ACLs
Transparent compression| No
Transparent encryption| No
Other
Supported operating systems| BeOS, ZETA, Haiku, SkyOS, Syllable, Linux

The Be File System (BFS) is the native file system for the BeOS. In the Linux kernel, it is referred to as "BeFS" to avoid confusion with Boot File System.

BFS was developed by Dominic Giampaolo and Cyril Meurillon over a ten-month period, starting in September 1996,[2] to provide BeOS with a modern 64-bit-capable journaling file system.[3] It is case-sensitive and capable of being used on floppy disks, hard disks and read-only media such as CD-ROMs. However, its use on small removable media is not advised, as the file-system headers consume from 600 KB to 2 MB, rendering floppy disks virtually useless.

Like its predecessor, OFS (Old Be File System, written by Benoit Schillings - formerly BFS),[4] it includes support for extended file attributes (metadata), with indexing and querying characteristics to provide functionality similar to that of a relational database.

Its design process, application programming interface, and internal workings are, for the most part, documented in the book Practical File System Design with the Be File System.[2]

## Contents

* 1 Implementations
* 2 See also
* 3 References
* 4 External links

## Implementations

In addition to the original 1996 BFS used in BeOS, there are several implementations for Linux. In early 1999, Makoto Kato developed a Be File System driver for Linux; however, the driver never reached a completely stable state, so in 2001 Will Dyson developed his own version of the Linux BFS driver.[5][6]

In 2002, Axel Dörfler and a few other developers created and released a reimplemented BFS called OpenBFS for Haiku (OpenBeOS back then).[7] In January 2004, Robert Szeleney announced that he had developed a fork of this OpenBFS file system for use in his SkyOS operating system.[8] The regular OpenBFS implementation was also ported to Syllable, with which it has been included since version 0.6.5.

## See also

* Comparison of file systems
* AtheOS File System

## References

1. ↑ Scot Hacker (1997-07-01). "BeOS Journal 10: A First Look at DR9". ZDNet. http://www.zdnet.com/products/osuser/boj/hacker10.html.
2. ↑ 2.0 2.1 2.2 Giampaolo, Dominic (1999) (PDF). Practical File System Design with the Be File System. Morgan Kaufmann. ISBN 1-55860-497-9. http://www.nobius.org/~dbg/practical-file-system-design.pdf. Retrieved 2004-06-01.
3. ↑ Andrew Orlowski (2002-03-29). "Windows on a database – sliced and diced by BeOS vets". The Register. https://www.theregister.co.uk/2002/03/29/windows_on_a_database_sliced/.
4. ↑ Henry Bortman. "Benoît Schillings, Software Engineer". The BeOS Bible. http://www.birdhouse.org/beos/bible/bos/int_schillings.html.
5. ↑ Will Dyson (2002). "BeFS driver for Linux: About BeFS". SourceForge. https://befs-driver.sourceforge.net/about.php.
6. ↑ "BeOS Filesystem for Linux". https://tech-pubs.net/reputable-archive/befs-linux.html.
7. ↑ Daniel Teixeira (2002-09-04). "OBFS Reaches Beta". Haiku News. http://haikunews.org/482.
8. ↑ Robert Szeleney (2004-01-23). "Update". skyos.org. http://www.skyos.org/?q=node/210.

## External links

* The BeOS file system: an OS geek retrospective, by Andrew Hudson, 2010-06-03, Ars Technica

* v
* t
* e

File systems

* Comparison of file systems
* distributed
* Unix filesystem

Disk|

* ADFS
* AdvFS
* Amiga FFS
* Amiga OFS
* APFS
* AthFS
* bcachefs
* BFS
* Be File System
* Boot File System
* Btrfs
* CVFS
* CXFS
* DFS
* EFS
* Encrypting File System
* Extent File System
* Episode
* ext
* ext2
* ext3
* ext3cow
* ext4
* FFS/FFS2
* FAT
* exFAT
* Files-11
* Fossil
* HAMMER
* HAMMER2
* HFS
* HFS+
* HPFS
* HTFS
* IBM Spectrum Scale
* JFS
* LFS
* MFS
* Macintosh File System
* TiVo Media File System
* MINIX
* NetWare File System
* Next3
* NILFS
* NILFS2
* NSS
* NTFS
* OneFS
* PFS
* QFS
* QNX4FS
* ReFS
* ReiserFS
* Reiser4
* Reliance
* Reliance Nitro
* RFS
* SFS
* SNFS
* Soup (Apple)
* Tux3
* UBIFS
* UFS
* soft updates
* WAPBL
* VxFS
* WAFL
* Xiafs
* XFS
* Xsan
* zFS
* ZFS

Optical disc|

* HSF
* ISO 9660
* ISO 13490
* UDF

Flash memory and SSD|

* APFS
* FAT
* exFAT
* CHFS
* TFAT
* EROFS
* FFS2
* F2FS
* HPFS
* JFFS
* JFFS2
* JFS
* LogFS
* NILFS
* NILFS2
* NVFS
* YAFFS
* UBIFS

Distributed|

* CXFS
* GFS2
* Google File System
* OCFS2
* OrangeFS
* PVFS
* QFS
* Xsan
* more...

NAS|

* AFS (OpenAFS)
* AFP
* Coda
* DFS
* Google File System
* IBM Spectrum Scale
* Lustre
* NCP
* NFS
* POHMELFS
* Hadoop
* SMB (CIFS)
* SSHFS
* more...

Specialized|

* Aufs
* AXFS
* Boot File System
* CDfs
* Compact Disc File System
* cramfs
* Davfs2
* EROFS
* FTPFS
* FUSE
* Lnfs
* LTFS
* NOVA
* MVFS
* SquashFS
* UMSDOS
* OverlayFS
* UnionFS
* WBFS

Pseudo and virtual|

* configfs
* devfs
* debugfs
* kernfs
* procfs
* specfs
* sysfs
* tmpfs
* WinFS

Encrypted|

* eCryptfs
* EncFS
* EFS
* Rubberhose
* SSHFS
* ZFS

Types|

* Clustered
* Global
* Grid
* Self-certifying
* Flash
* Journaling
* Log-structured
* Object
* Record-oriented
* Semantic
* Steganographic
* Synthetic
* Versioning

Features|

* Case preservation
* Copy-on-write
* Data deduplication
* Data scrubbing
* Execute in place
* Extent
* File attribute
* Extended file attributes
* File change log
* Fork
* Links
* Hard
* Symbolic

Access control|

* Access control list
* Filesystem-level encryption
* Permissions
* Modes
* Sticky bit

Interfaces|

* File manager
* File system API
* Installable File System
* Virtual file system

Lists|

* Cryptographic
* Default
* Log-structured

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