cdrestore - Streaming restore from CD-R(W)/DVD-R(W)
cdrestore [-qvDFRTV] [-d device] [-i image] [-l size]
[-t track] [-c command]
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).
The device name which is used for reading the backup.
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.
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,
The number of the data track on the media for reading the
-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)
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.
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
cdrestore -i /dev/dvd -t 3 -T
Stefan Hülswitt <email@example.com>
Copyright (c) 2000-2004 Craig Condit, Stefan Hülswitt.
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