dumplfs(8) [netbsd man page]

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

NAME

     dumplfs -- dump file system information

SYNOPSIS

     dumplfs [-adiS] [-b blkno] [-I blkno] [-s segno] filesys | device

DESCRIPTION

     dumplfs prints out the file system layout information for the LFS 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.

     The following flags are interpreted by dumplfs.

     -a      Dump the contents of all superblocks, not just the first.	Superblocks appear in the dumplfs output with the segment containing them.

     -b      Use the block specified immediately after the flag as the super block for the filesystem.

     -d      Check partial segment data checksums and report mismatches.  This makes dumplfs operate much more slowly.

     -I      Use the block specified immediately after the flag as the inode block containing the index file inode.

     -i      Dump information about the inode free list.

     -S      Dump information about the segment table.

     -s      Add the segment number immediately following the flag to a list of segments to dump.  This flag may be specified more than once to
	     dump more than one segment.  The default is to dump all segments.

SEE ALSO

     disktab(5), fs(5), disklabel(8), newfs_lfs(8)

HISTORY

     The dumplfs command appeared in 4.4BSD.

BSD
								   June 13, 2000							       BSD

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

NAME

     dumpfs -- dump UFS file system information

SYNOPSIS

     dumpfs [-f] [-l] [-m] filesys | device

DESCRIPTION

     The dumpfs utility prints out the UFS super block and cylinder group information for the file system or special device specified, unless the
     -f, -l or -m flag is 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.

     If -f is specified, a sorted list of all free fragments and free fragment ranges, as represented in cylinder group block free lists, is
     printed.  If the flag is specified twice, contiguous free fragments are not collapsed into ranges and instead printed in a simple list.
     Fragment numbers may be converted to raw byte offsets by multiplying by the fragment size, which may be useful when recovering deleted data.

     If -l is specified, the pathname to the file system's container derived from its unique identifier is printed.

     If -m is specified, a newfs(8) command is printed that can be used to generate a new file system with equivalent settings.  Please note that
     newfs(8) options -E, -R, -S, and -T are not handled and -p is not useful in this case so is omitted.  Newfs(8) options -n and -r are neither
     checked for nor output but should be.  The -r flag is needed if the filesystem uses gjournal(8).

SEE ALSO

     disktab(5), fs(5), disklabel(8), fsck(8), newfs(8), tunefs(8)

HISTORY

     The dumpfs utility appeared in 4.2BSD.

BSD
								   May 16, 2013 							       BSD