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Mkfatfs

Miro Kropacek edited this page Jan 19, 2017 · 2 revisions
  • Filesystem

mkfatfs is a filesystem creation tool. Main reason for this programm is to build TOS and DOS FAT12/FAT16/FAT32 partitions. Currently it can be found in the tools folder of your FreeMiNT distribution.

FAT32 is a extension of the existing FAT definition. The FAT (File Allocation Table) on existing partitions is 16 bit wide. This limits the maximum number of cluster to 65536 (under TOS to 32768 because of some bugs). So if you need large partitions you must increase cluster size. But this has a negative side effect. Large cluster also increase (..???)

It requires a hard disk driver that support at least XHDI level 1.10.

If you start mkfatfs without any parameter, you get the following output:

#./mkfatfs
mkfatfs 0.24, 2000-06-14 for TOS and DOS FAT/FAT32-FS
Found XHDI level 1.30.

No drive specified.

Usage: mkfatfs [OPTIONS] drv:
  -c            Check filesystem as is gets built
  -f <num>      Number of FATs (between 1 and 4)
  -F <num>      FAT size (12, 16, or 32)
  -i <id>       Volume ID as hexadecimal number (i.e. 0x0410)
  -l <filename> Bad block filename
  -m <filename> Boot message filename--text is used as a boot message
  -n <name>     Volume name
  -r <num>      Root directory entries (not applicable to FAT32)
  -s <num>      Sectors per cluster (2, 4, 8, 16, 32, 64, or 128)
  -a            Create filesystem always (disables partition ID checking)
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