dump man page on Xenix

Man page or keyword search:  
man Server   1130 pages
apropos Keyword Search (all sections)
Output format
Xenix logo
[printable version]



     DUMP(C)		      XENIX System V		       DUMP(C)

     Name
	  dump - Performs incremental file system backup.

     Syntax
	  dump [ key [ arguments ] filesystem ]

     Description
	  dump copies to the specified device all files changed after
	  a certain date in the filesystem.  The key specifies the
	  date and other options about the backup, where a key
	  consists of characters from the set 0123456789kfusd. The
	  meanings of these characters are described below:

	  f    Places the backup on the next argument file instead of
	       the default device.

	  u    If the backup completes successfully, writes the date
	       of the beginning of the backup to the file /etc/ddate.
	       This file records a separate date for each file system
	       and each backup level.

	  0-9  This number is the ``backup level''.  Backs up all
	       files modified since the last date stored in the file
	       /etc/ddate for the same file system at lesser levels.
	       If no date is determined by the level, the beginning of
	       time is assumed; thus the option 0 causes the entire
	       file system to be backed up.

	  s    For backups to magnetic tape, the size of the tape
	       specified in feet.  The number of feet is taken from
	       the next argument.  When the specified size is reached,
	       dump will wait for reels to be changed.	The default
	       size is 2,300 feet.

	  d    For backups to magnetic tape, the density of the tape,
	       expressed in BPI, is taken from the next argument.
	       This is used in calculating the amount of tape used per
	       write.  The default is 1600.

	  k    This option is used when backing up to a block-
	       structured device, such as a floppy disk.  The size (in
	       K-bytes) of the volume being written is taken from the
	       next argument. If the k argument is specified, any s
	       and d arguments are ignored.  The default is to use s
	       and d.

	  If no arguments are given, the key is assumed to be 9u and a
	  default file system is backed up to the default device.

     Page 1					      (printed 8/7/87)

     DUMP(C)		      XENIX System V		       DUMP(C)

	  The first backup should be a full level-0 backup:

	       dump 0u

	  Next, periodic level 9 backups should be made on an
	  exponential progression of tapes or floppies:

	       dump 9u

	  This progression is shown as follows:

	       1 2 1 3 1 2 1 4 ...

	  where backup 1 is used every other time, backup 2 every
	  fourth, backup 3 every eighth, etc.) When the level-9
	  incremental backup becomes unmanageable because a tape is
	  full or too many floppies are required, a level-1 backup
	  should be made:

	       dump 1u

	  After this, the exponential series should progress as if
	  uninterrupted.  These level-9 backups are based on the
	  level-1 backup, which is based on the level-0 full backup.
	  This progression of levels of backups can be carried as far
	  as desired.

	  The default file system and the backup device depend on the
	  settings of the variables DISK and TAPE, respectively, in
	  the file /etc/default/dump.

     Files
	  /etc/ddate	      Records backup dates of file
			      system/level

	  etc/default/dump    Default dump information

     See Also
	  XENIX Operations Guide
	  cpio(C), default(M), dumpdir(C), restore(C), dump(F)

     Page 2					      (printed 8/7/87)

     DUMP(C)		      XENIX System V		       DUMP(C)

     Diagnostics
	  If the backup requires more than one volume (where a volume
	  is likely to be a floppy disk or tape), you will be asked to
	  change volumes.  Press RETURN after changing volumes.

     Notes
	  Sizes are based on 1600 BPI for blocked tape; the raw
	  magnetic tape device has to be used to approach these
	  densities.  Write errors to the backup device are usually
	  fatal.  Read errors on the file system are ignored.

	  It is not possible to successfully restore an entire active
	  root file system.

     Warning
	  When backing up to floppy disks, be sure to have enough
	  formatted floppies ready before starting a backup.

     Page 3					      (printed 8/7/87)

[top]
                             _         _         _ 
                            | |       | |       | |     
                            | |       | |       | |     
                         __ | | __ __ | | __ __ | | __  
                         \ \| |/ / \ \| |/ / \ \| |/ /  
                          \ \ / /   \ \ / /   \ \ / /   
                           \   /     \   /     \   /    
                            \_/       \_/       \_/ 
More information is available in HTML format for server Xenix

List of man pages available for Xenix

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net