dcopy_hfs man page on HP-UX

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dcopy(1M)							     dcopy(1M)

       dcopy - copy HFS file system with compaction

       fsize[source_fs destination_fs

       The command copies an existing HFS file system (source_fs) to a new HFS
       file system (destination_fs), appropriately sized to hold  the  reorga‐
       nized  results.	 For  best results, the source file system should be a
       raw device, and the destination file system should be a	block  device.
       Always  run  on	unmounted file systems.	 (In the case of the root file
       system, copy it to a new minidisk.)

       If no options are specified, copies files from  source_fs,  compressing
       directories  by	removing vacant entries and spacing consecutive blocks
       in a file by the optimal rotational gap.	 If options  such  as  or  are
       specified, the destination file system structure will be different from
       that of the source file system.

       makes the destination file system identical to the source  file	system
       and  preserves  the  pack  and volume labels.  Thus, to compress a file
       system without moving it, use to copy the files to another file	system
       and the command to copy the file back (see dd(1)).

       Directory compression is accomplished by running on the primary copy of
       the file system and allowing the modified directories to	 propagate  to
       the other copies of the file system in the normal manner.

       recognizes the following options:

	      Move subdirectories to the beginning of directories.

	      Specify the file system size
			     (fsize)  and  inode-list  size (isize) in blocks.
			     If this option is not specified, the source file-
			     system value is used.

	      Specify the HFS file system type.
			     The  type of a file system can be determined with
			     the command (see fstyp(1M)).  See

	      Supply device information
			     for creating the best organization of blocks in a
			     file.   cyl  is the number of block per cylinder;
			     skip is the number of blocks to skip.

	      Report size of source and destination file system.

	      Echo the completed command line, but performs no other actions.
			     The command line is  generated  by	 incorporating
			     the  user-specified options and other information
			     derived from This option allows you to verify the
			     command line.

       can  be	executed with or without options.  If no options are specified
       as in this example, the source and destination file systems are identi‐
       cal.   Any  differences	between	 the  two file systems lie only in the
       available disk space.

       If options are specified, expect a major difference between the	source
       and destination file system structure:

       produces invalid results if run on a mounted file system.

       The figures specified in option arguments cannot be smaller than corre‐
       sponding figures in the source file system.

       only operates on HFS file systems.

       was developed by HP.

       dd(1), fstyp(1M), disk(7).


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