osx man page for dumpfs

DUMPFS(8)						    BSD System Manager's Manual 						 DUMPFS(8)

NAME
     dumpfs -- dump file system information

SYNOPSIS
     dumpfs [filesys | device]

DESCRIPTION
     Dumpfs prints out the super block and cylinder group information for the file system or special device specified.	The listing is very long
     and detailed.  This command is useful mostly for finding out certain file system information such as the file system block size and minimum
     free space percentage.

SEE ALSO
     fs(5), fsck(8), newfs(8), tunefs(8)

HISTORY
     The dumpfs command appeared in 4.2BSD.

4.2 Berkeley Distribution					   June 5, 1993 					 4.2 Berkeley Distribution