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NetBSD 6.1.5 - man page for dumplfs (netbsd section 8)

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

     dumplfs -- dump file system information

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

     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

     -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.

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

     The dumplfs command appeared in 4.4BSD.

BSD					  June 13, 2000 				      BSD

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