The mkfs utility constructs a file system on the raw_device_file by calling the specific mkfs module indicated by -F FSType.
Note: ufs file systems are normally created with the newfs(1M) command.
generic_options are independent of file system type. FSType-specific_options is a comma-separated list of keyword=value pairs (with no intervening spaces), which are FSType-specific. raw_device_file specifies the disk partition on which to write the file system. It is required and must be the first argument following the specific_options (if any). operands are FSType-specific. See the FSType-specific manual page of mkfs (for example, mkfs_ufs (1M)) for a detailed description.