@Tumbleweed
As per the changes.txt file; dunno if it is only cornerning OS4.
Added a new format with large file support, to use it select DOSType 'SFS\2' (0x53465302) for the partitions.
WARNING: It's not compatible to the older SFS2 versions, nor to standard SFS partitions (DOSType 'SFS\0', 0x53465300) and therefore tools like SFSCheck, PartitionWizard, etc. don't work on such partitions and you can't use such a partition for booting from U-Boot/SLB!
