UserDoc:AmigaOS File Systems

SFS\00 and SFS\02 support other block sizes but only 512 bytes should be used since it is slower with larger blocks. JXFS only supports 512 block size. Recovery tools are located in MediatToolbox in the SYS:System drawer. Always have a backup.

AmigaOS File System Table

	FastFileSystem (FFS)	FastFileSystem 2 (FFS2)	SmartFileSystem (SFS)	SmartFileSystem 2 (SFS2)	JXFS
Bootable?	Yes	Yes	Yes	Yes	No
DosType	DOS\03 0x444f5303	DOS\07 0x444f5307	SFS\00 0x53465300	SFS\02 0x53465302	JXF\04 0x4A584604
Max. Filename Length	30 characters	107 characters	107 characters	107 characters	107 characters
Max. Parition Size	2 TB to 128 TB	2 TB to 128 TB	128 GB	1 TB	256 TB
Max. File Size	4 GB - 2 Bytes	4 GB - 2 Bytes	4 GB - 2 Bytes	1 TB	256 TB
Supported Block Size	512 to 32768	512 to 32768	only 512	only 512	only 512
Comments	Legacy file system, not recommended for AmigaOS 4.x due to lack of long filename support. Can be used for bootloader partition in AmigaOS 4.x only setup.	Current file system, bootable, can be used with AmigaOS 4.x, recovery tools available, not as fast as SFS, requires validation if disk error.	Current file system, bootable, can be used with AmigaOS 4.x, some recovery tools available. Fast, does not require validation if disk error.	Current file system, bootable, can be used with AmigaOS 4.x. Fast, does not require validation if disk error. No Recovery tools.	Fastest but not backwards compatible with some 68K legacy software nor software which abuses DOS packets. No recovery tools.