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Backup performance mainly depends on the performance of the source disk and the destination disk. CPU performance is also an important factor, but newer CPUs are typically powerful enough and usually do not become a bottleneck. Therefore, priority should be given to the read/write speed of the source and destination drives.
As for how long the backup takes, in addition to source/destination disk performance, the total amount of data to be backed up is another major determining factor. When the backup time is significantly longer than expected, it is recommended to troubleshoot in the following order:
As for how long the backup takes, in addition to source/destination disk performance, the total amount of data to be backed up is another major determining factor. When the backup time is significantly longer than expected, it is recommended to troubleshoot in the following order:
- Check whether the source disk or destination disk has performance issues (e.g., poor cable connection, connected to a low-speed USB port, or bad sectors).
- Check whether the "Sector by sector backup" option is mistakenly enabled. This mode forces the software to read every sector of the entire disk, significantly reducing backup speed and making incremental backups take nearly as long as full backups.
