NAME
dumpfs
- dump file system information
SYNOPSIS
dumpfs
[-acFimsv]
filesys | device
[...]
DESCRIPTION
dumpfs
prints out detailed information about the specified filesystems.
Options:
- -a
-
Print details from each alternate superblock.
- -c
-
Print details of each cylinder group.
- -F
-
Dump a file system image from a file, not a special device.
- -i
-
Print details of each allocated inode.
- -m
-
Print details of the cylinder group summary.
- -s
-
Print details of the superblock.
- -v
-
Be even more verbose.
If none of
-a,
-c,
-i,
-m,
or
-s
are given, then
dumpfs
defaults to
-cmsv.
dumpfs
is useful mostly for finding out certain file system
information such as the file system block size, minimum
free space percentage, and the file system level that
can be upgraded with the
-c
option of
fsck_ffs(8).
All of this information is output by
dumpfs
-s.
SEE ALSO
disktab(5),
fs(5),
disklabel(8),
fsck(8),
fsck_ffs(8),
newfs(8),
tunefs(8)
HISTORY
The
dumpfs
command appeared in
4.2BSD.
The
-a,
-c,
-i,
-m,
and
-s
options, and the inode dump were added for
NetBSD2.0.