NAME
dumpfs —
dump file system
information
SYNOPSIS
dumpfs |
[-acFijmsv]
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.
-
-
- -j
- Print details of the WAPBL journal.
-
-
- -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,
-j,
-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
NetBSD 2.0. The
-j,
option was added for
NetBSD 6.0.