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

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

     dumpfs -- dump file system information

     dumpfs [-acFijmsv] filesys | device [...]

     dumpfs prints out detailed information about the specified filesystems.


     -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.

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

     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.

BSD					February 27, 2010				      BSD
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