dumpfs(8)dumpfs(8)Namedumpfs - dump file system information
The command 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 cer‐
tain file system information such as the file system block size and
minimum free space percentage.
See Alsodisktab(5), fs(5), fsck(8), newfs(8), tunefs(8)dumpfs(8)