NAME
dcopy — copy HFS file system with compaction
SYNOPSIS
/usr/sbin/dcopy
[-d]
[-f
fsize[:isize
]]
[-F
hfs]
[-scyl:skip
]
[-v]
[-V]
source_fs
destination_fs
DESCRIPTION
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.
Options
dcopy
recognizes the following options:
- -d
Move subdirectories to the beginning of directories.
- -ffsize[:isize]
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.
- -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.
- -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.
EXAMPLES
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/rdisk/disk4 /dev/disk/disk5
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/rdisk/disk4 /dev/disk/disk5
WARNINGS
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.
DEPENDENCIES
dcopy
only operates on HFS file systems.
AUTHOR
dcopy
was developed by HP.
STANDARDS CONFORMANCE
dcopy: SVID3
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