Sfs

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AmigaOS 4/PPC Smart Filesystem developed by Joerg Strohmayer
based on John Hendrikx' SFS 1.84, archive and documentation
updates up to 1.236 by Raphael Pilarczyk.

For updates check my SFS homepage http://strohmayer.org/sfs/


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                 USE AT YOUR OWN RISK!
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For more information read the included documentation

Introduction
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Smart Filesystem is a new filesystem for your Amiga.
A filesystem's main purpose is to store files on a disk in
such a way that they can be located and used quickly.  How
this is done is up to the filesystem.  The way information
is stored on your disk has a large impact on speed and space
efficiency, and so these factors can vary a lot from
filesystem to filesystem.

Smart Filesystem was created to provide you with an
alternative to the Fast Fileystem.  Smart Filesystem makes
more efficient use of your disk space (max speed with
512 bytes/block!), has better performance in most areas and
will allow for new features never seen before in an Amiga
filesystem.

Features
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 o FAST seeking. Even in extremely large files.

 o FAST reading of directories.

 o FAST reading/writing of files.

 o FAST defragmentation routines (100% transparent built-in optimiser)

 o Disk space is used VERY efficiently.

 o Blocksizes of 512 bytes up to 32768 bytes are supported.
   (512 BYTES FOR BEST PERFORMANCE IN 99%)

 o The length of file and dir names can be 107 characters. The lenght
   of 'pathes' can be 255 characters (AmigaOS 3.x, unlimited in
   AmigaOS4).

 o Volumename can be 30 characters.

 o The length of comments can be 79 characters (like FFS)

 o The size of a file is limited to about 4 GB (DOSType 'SFSￜ',
   several TB with DOSType 'SFS2').

 o Support for partitions larger than 4 GB or located (partially)
   beyond the 4 GB barrier on your drive.  There is support for the
   New Style Devices (NSD) and the 64-bit trackdisk commands (TD64)
   which support 64 bit access.

 o Supports partitions of up to 128 GB (DOSType 'SFSￜ', for 'SFS2'
   partitions the limit is 1 TB, but it can be more depending on the
   blocksize, with 32KB/Block it's 64 TB).

 o Modifying data on your disk is very safe.  Even if your system is
   resetted, crashes or suffers from powerloss your disk will not be
   corrupted and will not require long validation procedures before
   you will be able to use it again. In the worst case you will
   only lose the last few modifications made to the disk.

 o There is a built-in configurable read-ahead cache system which
   tries to speed up small disk accesses.  This cache has as a
   primary purpose to speed up directory reading but also works very
   well to speed up files read by applications which use small 
   buffers.

 o Supports Notification and ExamineAll.

 o Supports softlinks (hardlinks are not supported for now).

 o Using the SFSformat command you can format your SFS partition with
   case sensitive file and directory names. Default is case insensitive
   (like FFS).

 o There is a special directory which contains the last 350 (!) files
   which were deleted. (see sfsformat.txt)



Unimplemented features
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 o HardLinks
 o ACTION_LOCK_RECORD
 o ACTION_FREE_RECORD
 o ACTION_MAKE_LINK (soft links only at the moment)