When a drive is restored from an image that has been compromised, that drive is immediately re-infected. What about viruses, spyware, malware, and rootkits? A disk image contains all the files on a disk, and that includes infected files. A further consideration you should make is that you will need the disk imaging software to restore your files from the disk image. If the file becomes corrupted, or is deleted, then you may lose the entire file (the entire image). That single file contains the complete disk image. This file may be accessible on a single drive, or “spanned” over several disks. temporary files, cache files, junk, operating system files, etc.Īs the disk image definition stated earlier, an image is a single file. That includes files and folders that you may not want included in the backup, e.g. A disk imaging utility may use compression, but the resulting copy will still be a considerable size.Īn image must contain every single file and folder on the disk. This may result in backups being made less frequently, or not at all.ĭisk imaging utilities must read all parts of a disk (or at a minimum all the used parts of a disk), so the resulting image will be at least as large as all the files (and non-file data) on the disk. When a backup takes a long time it quickly becomes a chore and something to be avoided. Clearly this means it could take a very long time to make an image of a drive, especially with today’s increasingly larger drives. More advanced disk imaging utility software may be able to skip empty areas of a disk, but it must still read every part of a disk that is being used. It must do this because the image it is creating is an exact duplicate of the disk’s contents. The term has been generalized to cover any such file, whether taken from an actual physical storage device or not…īecause of the way disk imaging works, a disk imaging utility must read every part of a disk (or a partition of a disk). …a computer file containing the complete contents and structure of a data storage medium or device, such as a CD.
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