04/21/86  copy_disk, cd

Syntax as a command: cd source target {-ctl_args disk_range_specifier}


Function:  copy a physical volume from one disk to aother.



Arguments:
source
   represent the source disk in the standard form <subsys>_<nn>{s},
   where:
     subsys is the disk subsystem name (dska)
     nn is the device number. (00 to 64)
     s is the subvolume name, for MSU3380 or MSU3390 (a,b, or c).
       example: dska_02 or dskb_00b.
target
   represent the target disk in the standard form <subsys>_<nn>{s},
   (see source).


disk_range_specifier
   is any specification of a range of disk to copy, in the form
   acceptible to test_disk.  This range is specified via control
   arguments, as listed below.  The default is the entire disk, except
   for the ALT partition.


Control arguments:
-force, -fc
   suppresses the query, "Do you wish to write on <target>".
-first_record N, -frec N
   specifies the first record to be read and/or written.  Default is
   the first record number for the device type unless a partition is
   specified (in whose case the default is the first record of the
   partition).  The keywords 'first' and 'last' may be used in place
   of a record number which will specify the first or last record of
   the device (or partition if specified).


-last_record N, -lrec N
   specifies the last record to be read or written.  Default is the
   last record number for the device type or if a partition is
   specified the default is the last record of the partition.  Also
   like the -first_record argument the keywords 'first' and 'last' may
   be used to specify the default first and last records.
-n_records N, -nrec N
   specifies the number of records to be read or written.  Specifying
   -first_record and -n_records will cause test_disk to read and/or
   write to N records where the first record to be operated on is
   specified by -first_record.  Specifying -last_record and -n_records
   will cause test_disk to read and/or write to N records where the
   last record to be operated on will be specified by -last_record.
   Note: To operate on more than one record two of the following
   arguments must be used; -first_record, -last_record, -n_records.


-partition part_name, -part part_name
   optional argument which specifies a partition (where part_name is
   the name of the desired partition).  If a partition is specified
   then the defaults for the first and last page become the first and
   last page of the partition.
-record N, -rec N
   optional argument to specify a single page to be read or written.
   Like -first_record and -last_record the key words 'first' and
   'last' may be used.


Notes:

   Control arguments can be interspersed within the disk range
   specification.

   except for the "early" level, since only the RPV is known at that
   time.  It does not affect the state of a Multics image that should
   happen to be present.

   The source and target disks must be of the same type.


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Historical Background

This edition of the Multics software materials and documentation is provided and donated
to Massachusetts Institute of Technology by Group BULL including BULL HN Information Systems Inc. 
as a contribution to computer science knowledge.  
This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology,
Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell BULL Inc., Groupe BULL
and BULL HN Information Systems Inc. to the development of this operating system. 
Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970),
renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership
of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture 
for managing computer hardware properly and for executing programs. Many subsequent operating systems 
incorporated Multics principles.
Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., 
as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. .

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Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without
fee is hereby granted,provided that the below copyright notice and historical background appear in all copies
and that both the copyright notice and historical background and this permission notice appear in supporting
documentation, and that the names of MIT, HIS, BULL or BULL HN not be used in advertising or publicity pertaining
to distribution of the programs without specific prior written permission.
    Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc.
    Copyright 2006 by BULL HN Information Systems Inc.
    Copyright 2006 by Bull SAS
    All Rights Reserved