jfs_mkfs -VERSION (return code: 0)
jfs_mkfs version 1.1.15, 04-Mar-2011
jfs_mkfs -HELP (return code: 22)
jfs_mkfs: invalid option -- '-'
jfs_mkfs version 1.1.15, 04-Mar-2011
Usage: jfs_mkfs [-cOqV] [-j log_device] [-J options] [-L vol_label] [-s log_size] device [ blocks ]
Emergency help:
-c Check device for bad blocks before building file system.
-O Provide case-insensitive support for OS/2 compatability.
-q Quiet execution.
-V Print version information only.
-j log_device Set external journal device.
-J options Set external journal options.
-L vol_label Set volume label for the file system.
-s log_size Set log size (in megabytes).
NOTE: -j and -J cannot be used at the same time.