![]() Recovery of an entire volume is likewise quick and painless. It excels at duplicating hard drive volumes quickly and painlessly. ![]() SuperDuper is renowned for its speed, ease of use, and low cost. Since Snapshots preserve history, the disk serving as the destination will eventually become full. Depending upon the application, the destination for Snapshots can be a disk, partition, folder, or disk image. Since Snapshots preserve older versions of files, you can recover earlier versions of files that have been backed up. Subsequent backups copy only new or changed files since the last backup. The first backup of the source copies everything to the destination. Snapshots are also an exact duplicate of the data backed up, but with a twist: Snapshots preserve history. Updating a Copy generally synchronizes the Copy with the source: new or changed files are copied to the backup and files deleted from the source since the last backup are deleted from the Copy. The only files that can be recovered from a Copy are those extant when the backup was created. Since Copies are exact duplicates of the source at the time of the backup, they do not preserve history, such as older versions of files or files that have been deleted from the source. Some backup and recovery applications support saving Copies to a folder or a disk image.Īs Copies are saved in the same structure as the original data, they have an additional property: a Copy of a bootable volume, such as the Mac OS X startup disk, that is saved to a dedicated partition can be used as a startup disk, also known as a bootable duplicate. Other third-party backup and recovery applications may refer to Copies as duplicates or clones.Ĭopies are primarily used to duplicate a disk, partition, or collection of files to another disk or partition of a size greater than or equal to the amount of data being backed up. Think of a Copy as a genetic clone of the source. A Copy is an exact duplicate of a disk, partition, or collection of files. For example, if Macintosh HD will be restored from a backup saved on a partition on a FireWire drive, the backup is the source and Macintosh HD is the destination. In recovery, these terms are reversed: the source is the backup itself and the destination is where the saved data will be restored. ![]() For example, if you back up the Macintosh HD volume in your Mac to a partition on a FireWire drive, Macintosh HD is the source and the partition on the FireWire drive is the destination. In creating backups, most backup and recovery applications use the terms source and destination to specify the data to be backed up and where the backup is saved, respectively. If your Mac has a FireWire® port, we recommend using FireWire over USB 2.0 drives.
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