dcopy - copy HFS file system with compaction.
/usr/sbin/dcopy [-d] [-ffsize[:isize]] [-F hfs] [-scyl:skip] [-v] [-V]
The dcopy command copies an existing HFS file system (source_fs) to a
new HFS file system (destination_fs), appropriately sized to hold the
reorganized 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 dcopy on unmounted file systems. (In the case of
the root file system, copy it to a new minidisk.)
If no options are specified, dcopy 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 -f or -s are specified, the destination file system
structure will be different from that of the source file system.
dcopy 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 dcopy to copy the files to another
file system and the dd command to copy the file back (see dd(1)).
Directory compression is accomplished by running dcopy 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.
dcopy recognizes the following options:
-d Move subdirectories to the beginning of
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
-F hfs Specify the HFS file system type. The type of a
file system can be determined with the fstyp
command (see fstyp(1M)). See DEPENDENCIES.
-scyl:skip 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.
Hewlett-Packard Company - 1 - HP-UX Release 11i: November 2000
-v Report size of source and destination file system.
-V 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 /etc/fstab. This option
allows you to verify the command line.
dcopy can be executed with or without options. If no options are
specified as in this example, the source and destination file systems
are identical. Any differences between the two file systems lie only
in the available disk space.
dcopy /dev/rdsk/c2d0s4 /dev/dsk/c2d0s5
If options are specified, expect a major difference between the source
and destination file system structure:
dcopy -F hfs -f40960:260 -s45:5 -d /dev/rdsk/c2d0s4 \
dcopy produces invalid results if run on a mounted file system.
The figures specified in option arguments cannot be smaller than
corresponding figures in the source file system.
dcopy only operates on HFS file systems.
dcopy was developed by HP.
Hewlett-Packard Company - 2 - HP-UX Release 11i: November 2000