NAME

       cdrestore - Streaming restore from CD-R(W)/DVD-R(W)

SYNOPSIS

       cdrestore [-qvDFRTV] [-d device] [-i image] [-l size]
                 [-t track] [-c command]

DESCRIPTION

       cdrestore  is  a  utility  to  make  streaming  restores from CD-R(W)/DVD-R(W) disks. It's
       designed to work with  any  backup  tool  which  is  able  to  restore  from  stdin  (like
       tar/cpio/afio).

OPTIONS

       -d device
              The device name which is used for reading the backup.
              (default: /dev/cdrom)

       -i image
              Enables  virtual  image  mode. The backup stream is read from the given image file.
              You have to use this option, if you are restoring from a dumped image too.
              (default: none)

       -l size
              Specifies the media size. This value is used to display the free space on the media
              only.
              By default the given value is taken as megabytes. You can append a single letter to
              the number to select: (k)ilobytes,  (m)egabytes,  (g)igabytes  or  (s)ectors  (e.g.
              170k, 4488m, 350000s).
              (default: 650m)

       -t track
              The number of the data track on the media for reading the backup.
              (default: none)

       -T     Enables  test  mode.  The  complete  restore process is done to test data integrity
              (includes CRC checksum test, if available), but no data is output.
              NOTE: This only verifies that the data  is  readable  by  cdrestore  at  all.  This
              doesn't  guarantee that your backup software will be able to do a real restore with
              the data.

       -F     Forces cdrestore to begin the restore in the middle of a multi-disk set.  This  may
              be useful if you have lost a disk or a disk is badly damaged.
              NOTE: This will most probably start the restore in the middle of a file. It's up to
              your backup software to sync to the beginning of the next file.

       -R     Disable the kernel readahead for the CDROM device during the restore process.  (see
              cdbackup(1) Known problems)

       -c command
              The  command  which is executed whenever cdrestore needs to request a new media for
              multi-disk backups. This command (or script) should  prompt  the  user  and  return
              after  the  device  is ready again. The command receives one argument, which is the
              device name passed with -d. This can be used to issue commands to the  device  like
              ejecting the media.
              (default: use internal diskchange prompt)

       -q     Queries the media, prints out the contents and exits.

       -v     Enables verbose mode.

       -D     Enables DEBUG output (probably not useful for normal use).

       -V     Prints out version information and exits.

EXAMPLES

       Query the 700 MB media on /dev/sr0:

              cdrestore -d /dev/sr0 -l 700 -q

       Restore  a  tar  archive  to  the  current  directory  from  track  2 of a 702 MB media on
       /dev/scd0:

              cdrestore -d /dev/scd0 -l 702 -t 2 | tar xf -

       Query the contents of a virtual image:

              cdrestore -i /tmp/vimage -l 4488m -q

       Check data integrity of track 3 in a virtual image after dumping it to DVD media:

              cdrestore -i /dev/dvd -t 3 -T

AUTHORS

       Stefan Huelswitt <s.huelswitt@gmx.de>

SEE ALSO

       cdbackup(1)

LICENSE

       Copyright (c) 2000-2012 Craig Condit, Stefan Huelswitt.

       Redistribution and use in source and binary  forms,  with  or  without  modification,  are
       permitted provided that the following conditions are met:

       1.     Redistributions of source code must retain the above copyright notice, this list of
              conditions and the following disclaimer.

       2.     Redistributions in binary form must reproduce the above copyright notice, this list
              of  conditions  and  the  following  disclaimer  in  the documentation and/or other
              materials provided with the distribution.

       THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR  IMPLIED  WARRANTIES,
       INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
       PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
       FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL,  SPECIAL,  EXEMPLARY,  OR  CONSEQUENTIAL DAMAGES
       (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF  USE,
       DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
       WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
       IN  ANY  WAY  OUT  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
       DAMAGE.