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 Hülswitt <s.huelswitt@gmx.de>
SEE ALSO
cdbackup(1)
LICENSE
Copyright (c) 2000-2004 Craig Condit, Stefan Hülswitt.
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.