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DAR_XFORM(1)		    General Commands Manual		  DAR_XFORM(1)

       dar_xform - disk	archive	"re-slicer"

       dar_xform [options] [<path>/]source [<path>/]destination

       dar_xform -h

       dar_xform -V

       dar_xform changes the size of slices of an existing archive.

       Source  is  the	basename  of  the existing archive, destination	is the
       basename	of the archive to be created. If source	basename is  "-",  the
       archive	is  read  from	standard input.	If the destination basename is
       "-", the	archive	is written to standard output and  -s  option  is  not

       -h		   displays help usage.

       -V		   displays version information.

       -b		   make	the terminal ring when user interaction	is re-
			   quired (like	for example  the  creation  of	a  new
			   slice when using the	-p option)

       -s <number>	   Size	 of the	slices in bytes. If the	number is fol-
			   lowed by k (or K), M, G, T or  P  the  size	is  in
			   kilobytes,	megabytes,   gigabytes,	 terabytes  or
			   petabytes respectively. Example: by	default	 "20M"
			   means  20  megabytes	 it  is	 the  same  as	giving
			   20971520 as argument	(see also  -aSI	 and  -abinary
			   options).  If  -s is	not present the	backup will be
			   written to a	single slice whatever the size of  the
			   backup  may	be  (there is probably some filesystem
			   limitation, thus you	 might	expect	problems  with
			   file	 size  over  2	gigabytes,  depending  on your

       -S <number>	   -S gives the	size of	the first slice	which  may  be
			   chosen  independently  of  the  size	 of  following
			   slices. This	option needs -s	and  by	 default,  the
			   size	 of  the first slice is	the same as the	one of
			   the following slices.

       -p [<integer>]	   pauses before writing to a new slice	(this requires
			   -s).	 By  default there is no pause,	all slices are
			   output in the same directory, up to the end of  the
			   backup  or  until  the  filesystem is full. In this
			   later case, the user	is informed  of	 the  lack  of
			   disk	 space	and dar	stops for user interaction. As
			   soon	as some	disk space is available, the user  can
			   continue the	backup.	The optional integer that this
			   option can receive tells dar	to only	pause very 'n'
			   slice.  Giving  3  for 'n' will make	dar pause only
			   after slices	3, 6, 9	and so on. If this integer  is
			   not	specified, the behavior	is as if '1' was given
			   as argument which makes dar pause after each	slice.

       -n		   Do not allow	overwriting of any slice.

       -w		   Do not warn before overwriting  slice.  By  default
			   (no	-n  and	 no  -w)  overwriting is allowed but a
			   warning is issued before proceeding.

       -E <string>	   the string is a command-line	to be launched between
			   the	slices	of the destination archive. See	dar(1)
			   man page (same option) for more information.

       -F <string>	   the string is a command-line	to be launched between
			   the	slices	of  the	source archive.	See dar(1) man
			   page	(same option) for more information.

       -aSI[-unit[s]]	   when	using k	M G T E	Z Y prefixes to	define a size,
			   use	the  SI	 meaning:  multiple of 10^3 (a Mega is

       -abinary[-unit[s]]  when	using k	M G T E	Z Y prefixes to	define a size,
			   use the historical computer science meaning:	multi-
			   ple of 2^10	(a Mega	is 1,048,576).

       -aSI and	-abinary can be	used several times,  they  affect  all	prefix
       which  follow  even those found in file included	by -B option up	to the
       next -a... occurrence. Note that	if in a	file included by -B option  an
       -abinary	or -aSI	is met,	it affects all the following prefix even those
       outside the included files (for example in the following	 "-B  some.dcf
       -s  1K" 1K may be equal to 1000 or 1024 depending on the	presence of an
       -aSI or -abinary	in the file some.dcf. By default (before any  -aSI/bi-
       nary  argument  has  been  reached), binary interpretation of suffix is
       done (for compatibility with older versions).

       -Q		   Do not display  any	message	 on  stderr  when  not
			   launched from a terminal (for example when launched
			   from	an at job or crontab). Remains that any	 ques-
			   tion	 to  the  user	will be	assumed	a 'no' answer,
			   which most of the time will abort the program.

       -^ perm[:user[:group]]
			   defines the permission and  ownership  to  use  for
			   created slices.

       -3  <algo>	   Beside  each	 created  slice	is generated an	on-fly
			   hash	file using the specified algorithm.  Available
			   algorithm  are "md5"	and "sha1", by default no hash
			   file	is generated. This option description is  more
			   detailed  in	 dar  man  page	(where it has the same
			   designation as here).

       -9 <src_num>[,<dst_num>]
			   Defines the minimum number of digit to use for  the
			   source  archive  and	eventually for the destination
			   archive. If the source has not been defined with  a
			   minimum  number of digits and you want to specify a
			   number of digits for	the destination	 archive,  use
			   zero	 (or  one) as value for	src_num. If dst_num is
			   not provided, it defaults to	1. See the same	option
			   in dar man page for more details.

       Dar_xform  is  not  concerned by	encryption or compression. It does not
       need to be aware	of it to be able to change the slice scheme. Thus,  it
       is not able to uncompress or uncipher an	archive.

       dar_xform uses the same exit status as dar does,	see dar(1) man page.

       Any  signal sent	to dar_xform will abort	the program immediately, there
       is no way to have a proper termination before the end of	the process

       dar(1), dar_slave(1), dar_manager(1), dar_cp(1),	dar_split(1)


       Denis Corbin

3rd Berkeley Distribution	Sept 29th, 2016			  DAR_XFORM(1)


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