(dedicated to my beloved first CD recorder)
Simplified Backup on CD, DVD, or BD for Linux
- backup large amounts of data on one or more CD, DVD, or BD,
- simple (therefore no excuse not to do the backup),
- no special tool needed for reading the backup
- ISO9660 file systems (readable after : mount )
- afio archives (readable by : afio ... /dev/cdrom)
- Breaks the 650 MB / 4.7 GB / 25 GB limits (more than one CD / DVD / BD)
- Information script on each media tells where a certain file may be found
- Interrupted backups can be resumed at the start of the failed piece
- Verification of resulting media by MD5 checksums
- Optional high redundancy backups with several media copies
- Incremental backups with an arbitrary number of levels
- Restore utility searches most recent backuped file versions
Hardware and system requirements:
A CD recorder suitable for
I.e. most old SCSI connected ones and about all connected via
IDE/ATAPI, USB, or SATA.
The drive has to be reachable via a SCSI address. On modern Linux systems,
other connection types can be used via an emulated SCSI bus.
On kernel 2.6, recent versions of said programs got direct support for IDE
burners via address prefixes ATAPI: and ATA: or device files /dev/hdX.
Nevertheless SATA and USB continue to appear as pseudo-SCSI.
A DVD or BD writer suitable for
Unsuitable drives are not known yet.
It has to be reachable via a SCSI device file. On modern Linux systems, other
connection types can be used via an emulated SCSI bus.
On kernel 2.6, the programs can use device files /dev/hdX or /dev/srN directly.
As an alternative, it is possible to use
If you got any other high capacity backup devices
which you want to use rather than a CD recorder then please contact me.
I am interested in learning how to use them for writing of backup data.
Software requirements :
On Linux try type -p with the program name to find out wether
the programs are already installed on your system.
Required for writing CD and formatting ISO-Filesystems:
based on libburn
Additionally advised for writing DVD, BD:
growisofs, dvd+rw-mediainfo, dvd+rw-format
based on libburn
- are preferred over the burn programs of cdrtools or cdrkit
which provide less comfortable DVD write services but may be used via
Additionally required for system backups,
compressed or encrypted backups:
- Program afio is a well tested and solid archiver.
- Program star is an archiver which can make
very complete backups including ACLs.
Further software requirements:
- A C language compiler including linker and other usual companions
is needed for installing scdbackup from source but not for its usage.
- compatible to GNU Bourne-Again SHell (bash).
including usual programs like: cat, date, du, echo, ls, ...
see hints for working around
shell compatibility problems
- data compression program (for compressed afio and incremental backups)
This program system has been tested on Intel/AMD Linux systems only.
Ports to other usable systems are appreciated.
Each of the commands examines the backup data, plans their distribution over
the media and then prompts the user to insert fresh media until all are done.
- The idea is to use afio archives for the system directories.
All normal user data should be backuped
as ISO9660 for fast and easy access.
Each command is available in a version for CD and one for DVD / BD.
For BD with capacity "25 GB" use sdvdbackup commands with option -bd,
for "50 GB" use option -bd_dl.
- backup of system directories as afio archives. (not mountable)
- backup of the user's $HOME directory. ISO9660. (mountable)
- See a sample run.
- command for defining own backup collections and for spontaneous data copies. ISO9660. (mountable)
Backup /home and /usr/home . But use /home2 on CD as name for /usr/home and omit subdir /home/guest
- scdbackup /home /home2=/usr/home -not /home/guest
- like scdbackup but using afio archives rather than ISO9660 file systems. (not mountable)
- verifies a resulting media by comparison with its checksum which is
recorded on the hard disk of the scdbackup computer and also on the media
- searches files in multilevel backups. It helps restoring from ISO-9660
backups by prompting for the right media, by setting permissions
and by optional overwrite protection.
- Sample runs of: Configuration, Backup, Retrieval
- scdbackup-0.9.2.tar.gz (775 K).
- Helper software:
xorriso-1.0.2.tar.gz (1800 K)
Can produce ISO 9660 filesystem images and burn them to CD, DVD, or BD.
See also GNU xorriso Homepage.
- afio-2.5.tgz (175 K, by Koen Holtman)
Only needed if afio is not installed on your system.
- bc-1.06.tar.gz (272 K)
Only needed if you want to apply the locking protocol or if you
got neither the command expr nor a bash with builtin expression $((...)).
- Alternative burn programs:
(137 K, by Andy Polyakov)
Contains growisofs which can be used to write on DVD and BD.
Check for a more recent version at
cdrskin-1.0.2.pl00.tar.gz (855 K)
can substitute for cdrecord and growisofs.
See also cdrskin Homepage.
- README Features, Installation, Components
- scdbackup_verify -help usage of the checkread command
- ASKME -help usage of the backup information script
- scdbackup_askme -help usage of the accelerator program for searching within the backup information script
- cd_backup_planer -help elementary features of the central program and a lot of additional options.
- scdbackup-x86-rip.txt usage of scdbackup with rescue system RIP (x86-Linux).
- Thomas Schmitt, firstname.lastname@example.org
- BSD License, an Open Source approved license
- Most recent version, Changelog (if you are really curious)
Many thanks to Joerg Schilling for cdrecord and star,
to him and Eric Youngdale for mkisofs, to Koen Holtman for afio,
and to Andy Polyakov for growisofs .
Enjoying free Open Source hosting by www.webframe.org
and by sourceforge.net
- Links to my other published software projects :
xorriso, an integrated ISO 9660 Rock Ridge multi-session tool
cdrskin, a cdrecord emulator
Some Tools for Image Collectors
pppoem, a DSL throughput monitor for Linux kernel 2.4 and 2.6
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