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Universal Disk Format (UDF) is an open, vendor-neutral file system for computer data storage for a broad range of media. In practice, it has been most widely used for DVDs and newer optical disc formats, supplanting ISO 9660. Due to its design, it is very well suited to incremental updates on both recordable and (re)writable optical media. UDF was developed and maintained by the Optical Storage Technology Association (OSTA).
A live CD is a complete bootable computer installation including operating system which runs directly from a CD-ROM or similar storage device into a computer's memory, rather than loading from a hard disk drive. A live CD allows users to run an operating system for any purpose without installing it or making any changes to the computer's configuration. Live CDs can run on a computer without secondary storage, such as a hard disk drive, or with a corrupted hard disk drive or file system, allowing data recovery.
An optical disc image is a disk image that contains everything that would be written to an optical disc, disk sector by disc sector, including the optical disc file system. ISO images are expected to contain the binary image of an optical media file system, including the data in its files in binary format, copied exactly as they were stored on the disc. The data inside the ISO image will be structured according to the file system that was used on the optical disc from which it was created.
Optical disc authoring, including CD, DVD, and Blu-ray Disc authoring, is the process of assembling source material—video, audio or other data—into the proper logical volume format to then be recorded ("burned") onto an optical disc. This act is usually done illegally, by pirating copyrighted material without permission from the original artists.
K3b is a CD, DVD and Blu-ray authoring application by KDE for Unix-like computer operating systems. It provides a graphical user interface to perform most CD/DVD burning tasks like creating an Audio CD from a set of audio files or copying a CD/DVD, as well as more advanced tasks such as burning eMoviX CD/DVDs. It can also perform direct disc-to-disc copies. The program has many default settings which can be customized by more experienced users. The actual disc recording in K3b is done by the command line utilities cdrecord or cdrkit, cdrdao, and growisofs. As of version 1.0, K3b features a built-in DVD ripper.
VOB is the container format in DVD-Video media. VOB can contain digital video, digital audio, subtitles, DVD menus and navigation contents multiplexed together into a stream form. Files in VOB format may be encrypted.
A container format or metafile is a file format that allows multiple data streams to be embedded into a single file, usually along with metadata for identifying and further detailing those streams. Notable examples of container formats include archive files and formats used for multimedia playback. Among the earliest cross-platform container formats were Distinguished Encoding Rules and the 1985 Interchange File Format.
CloneDVD is a proprietary DVD cloning software, developed by Elaborate Bytes, that can be used to make backup copies of any DVD movie not copy-protected. The program is able to transcode a dual layer DVD movie to fit it onto a DVD-R, DVD+R or DVD+R DL disc. Users also have the choice to strip audio streams, subtitles and chapters. This is called customize. For example, users can edit and delete certain parts of a DVD that they don't want burned, such as the main menu, bonus features, commentary, or certain scenes from the actual DVD. By moving a quality bar the user can make the DVD fit its target medium.
In computing, data recovery is a process of retrieving deleted, inaccessible, lost, corrupted, damaged, or formatted data from secondary storage, removable media or files, when the data stored in them cannot be accessed in a usual way. The data is most often salvaged from storage media such as internal or external hard disk drives (HDDs), solid-state drives (SSDs), USB flash drives, magnetic tapes, CDs, DVDs, RAID subsystems, and other electronic devices. Recovery may be required due to physical damage to the storage devices or logical damage to the file system that prevents it from being mounted by the host operating system (OS).
The terms Recovery disc, Rescue Disk/Disc and Emergency Disk all refer to a capability to boot from an external device, possibly a thumb drive, that includes a self-running operating system: the ability to be a boot disk/Disc that runs independent of an internal hard drive that may be failing, or for some other reason is not the operating system to be run.
TestDisk is a free and open-source data recovery utility that helps users recover lost partitions or repair corrupted filesystems. TestDisk can collect detailed information about a corrupted drive, which can then be sent to a technician for further analysis. TestDisk supports DOS, Microsoft Windows, Linux, FreeBSD, NetBSD, OpenBSD, SunOS, and MacOS. TestDisk handles non-partitioned and partitioned media. In particular, it recognizes the GUID Partition Table (GPT), Apple partition map, PC/Intel BIOS partition tables, Sun Solaris slice and Xbox fixed partitioning scheme. TestDisk uses a command line user interface. TestDisk can recover deleted files with 97% accuracy.
AVCHD is a file-based format for the digital recording and playback of high-definition video. It is H.264 and Dolby AC-3 packaged into the MPEG transport stream, with a set of constraints designed around the camcorders.
IsoBuster is a data recovery computer program by Smart Projects, a Belgian company founded in 1995 by Peter Van Hove. As of version 3.0, it can recover data from damaged file systems or physically damaged disks including optical discs, hard disk drives, USB flash drives and solid-state disks. It has the ability to access "deleted" data on multisession optical discs, and allows users to access disc images and to extract files in the same way that they would from a ZIP archive. IsoBuster is also often used by law enforcement and data forensics experts.
dvdisaster is a computer program aimed to enhance data survivability on optical discs by creating error detection and correction data, which is used for data recovery. dvdisaster works exclusively at the image level. This program can be used either to generate Error-Correcting Code (ECC) data from an existing media or to augment an ISO image with ECC data prior to being written onto a medium. dvdisaster is free software available under the GNU General Public License.
Brasero is a free and open-source disc-burning program for Unix-like operating systems, it serves as a graphical front-end to cdrtools, cdrskin, growisofs, and (optionally) libburn. Licensed under the terms of the GNU General Public License.
DVD-Video is a consumer video format used to store digital video on DVD discs. DVD-Video was the dominant consumer home video format in Asia, North America, Europe, and Australia in the 2000s until it was supplanted by the high-definition Blu-ray Disc. Discs using the DVD-Video specification require a DVD drive and an MPEG-2 decoder. Commercial DVD movies are encoded using a combination of MPEG-2 compressed video and audio of varying formats. Typically, the data rate for DVD movies ranges from 3 to 9.5 Mbit/s, and the bit rate is usually adaptive. DVD-Video was first available in Japan on November 1, 1996, followed by a release on March 24, 1997 in the United States—to line up with the 69th Academy Awards that same day.
A CD-ROM is a type of read-only memory consisting of a pre-pressed optical compact disc that contains data. Computers can read—but not write or erase—CD-ROMs. Some CDs, called enhanced CDs, hold both computer data and audio with the latter capable of being played on a CD player, while data is only usable on a computer.
Notable software applications that can access or manipulate disk image files are as follows, comparing their disk image handling features.
Nero Burning ROM, commonly called Nero, is an optical disc authoring program from Nero AG. The software is part of the Nero Multimedia Suite but is also available as a stand-alone product. It is used for burning and copying optical discs such as CDs, DVDs, Blu-rays. The program also supports label printing technologies LightScribe and LabelFlash and can be used to convert audio files into other audio formats.
Hetman Partition Recovery is a shareware program for recovery of deleted data from hard drive partitions and other storage media. The utility supports both functioning disks and damaged logical partitions and recovers data from both reformatted disks and disks which have had their file system changed from FAT to NTFS or vice versa. In addition to working on existing partitions the tool can also find deleted logical drives, displaying them to the user for further search and recovery of deleted files as well as correcting errors in logical partition design. Hetman Partition Recovery supports reading of regular, zipped, and encrypted files, from disks formatted under NTFS and/or FAT file systems.
References
- ↑ CDRoller FAQs – File and Data Recovery Toolset
- 1 2 Download CDRoller – Data Recovery Toolset
- ↑ Paul Goldenberg. 2007-10-01. "Recover Lost Data from CD and DVD Media"
- ↑ Jon Jacobi, 2008-12-31. "Recover Data from Optical Media With CDRoller". PC World .
- ↑ "Retrieve irreplaceable DVD video off 8 cm discs". CDRoller. 14 May 2008. Retrieved 10 May 2015.
