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 fsdb(1M)							    fsdb(1M)

      fsdb - file system debugger (generic)

      /usr/sbin/fsdb [-F FStype] [-o specific_options] [-V] special

      Always execute the fsck command (see fsck(1M)) after running fsdb.

      The fsdb command can be used to patch up a damaged file system after a
      crash.  It is intended for experienced users only.  The file system
      type to be debugged is specified as FStype.  Each file system type has
      a unique structure requiring different debugging capabilities.  The
      manual entries for the file-system-specific fsdb should be consulted
      before attempting any debugging or modifications.

    Options and Arguments
      fsdb recognizes the following options and arguments:

	   special	  The file name of the special file containing the
			  file system.

	   -F FStype	  Specify the file system type on which to operate
			  (see fstyp(1M) and fs_wrapper(5)).  If this option
			  is not included on the command line, then the file
			  system type is determined from the file /etc/fstab
			  by matching special with an entry in that file.
			  If there is no entry in /etc/fstab, then the file
			  system type is determined from the file

	   -o specific_options
			  Specify suboptions specific to each file system
			  type.	 specific_options is a comma-separated list
			  of suboptions and/or keyword/attribute pairs
			  supported by the specific FStype.

	   -V		  Echo the completed command line, but perform no
			  other action.	 The command line is generated by
			  incorporating the user-specified options and other
			  information derived from the /etc/fstab file.
			  This option allows the user to verify the command

      Invoke the file system debugger on HFS file system /dev/dsk/c1d2s0:

	   fsdb -F hfs /dev/dsk/c1d2s0

 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000

 fsdb(1M)							    fsdb(1M)

      Display a completed command line without executing the debugger:

	   fsdb -V /dev/dsk/c1d2s0

      The previous command might display:

	   fsdb -F hfs /dev/dsk/c1d2s0

      Only experienced users should use fsdb.  The failure to fully
      understand the usage of fsdb and the file system's internal
      organization can lead to complete destruction of the file system and
      total loss of data.

      fsdb was developed by HP and AT&T.

      /etc/default/fs	       Specifies the default file system type
      /etc/fstab	       Static information about the file systems

      fsck(1M), fsdb_hfs(1M), fsdb_vxfs(1M), fstyp(1M), stat(2),

      fsdb: SVID3

 Hewlett-Packard Company	    - 2 -   HP-UX Release 11i: November 2000