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{{Infobox filesystem
| name                   = IceFS
| full_name              = IceFileSystem
| developer              = Leif Salomonsson
| partition_id           = 0x49434502
| max_filename_size      = 107 (255) characters
| max_volume_size        = <2 [[terabyte|TB]]
| OS                     = [[MorphOS]]
}}
The '''IceFileSystem''' ('''IceFS''') is a 64-bit [[journaling filesystem]] written in [[AmigaE|E]] for [[MorphOS]]. The design prioritizes reliability, scalability, efficiency, and speed.
A [[keyfile]] is no longer required since version 2.8, when IceFS was released as [[freeware]].

== Technical ==
{{quote |
* [[Extent_(file_systems)|Extent]] based space and file data layout.
* Main space allocator is based on the [http://www.gii.upv.es/tlsf/ TLSF] algorithm, adapted for on-disk storage.
* All metadata except extent headers are located in special extents called pools and use a local bitmap to keep track of free meta space. Metadata is very compact.
* Implementation uses two-level caching (sector + metadata).
* Implementation supports preallocation to minimize fragmentation (and increase speed) when several files are concurrently written to.
* Was originally supposed to have a tree-like lookup mechanism for directory entries, but this was reverted to a simple [[hash table]] for the 2.x version because the implementation was not finished.
| ''Leif Salomonsson'', developer}}

== Tools ==
[[File:Icefs tools.png|thumb|300px|MorphOS Tools drawer containing the IceFileSystem MUI tools]]
The following [[Command-line_interface|command line]] and graphical [[Magic_User_Interface|MUI]] tools are included with IceFS:

* FSFormat - Generic formatting application (MUI)
* IceConfig - IceFS configuration application (MUI)
* IceInfo - Displays locks and notifys on IceFS volumes (MUI)
* IceCheck - Check integrity of on-disk layout (CLI)
* LogFileCtrl - Create and change size of logfiles (CLI)
* IceSalv - Simple file salvage tool (CLI)
* ShowLinks - Lists hard and soft links (CLI)

[http://www.blubbedev.net/icefs/doctor.html IceDoctor], a commercial tool for [[data recovery]] is also available from the developer.

== See also ==
* [[Smart File System]]
* [[Professional File System]]
* [[List of file systems]]

== External links ==
* [http://blubbedev.net/icefs/ Homepage]
{{MorphOS}}

[[Category:Disk file systems]]
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