Advanced Backup Options: Macrium Change Block Tracker (CBT) For this reason, it is used as the second level of the GFS scheme ( ). This can make management of off-site or archive storage easier as older differential backup files can be deleted without invalidating the backup chain. The advantage, however, is that the backup chain will only consist of the full and a single differential image. As changes accumulate over time since the full image, the size and time required since differential images will consequently increase. Instead of referencing the previous incremental, these always reference the full image. You could argue that an incremental backup set is more vulnerable to an accidental deletion of a file in the set.ĭifferential images are special case incremental images.
The image data used for a restore is stored once on the disk (either in one full image file or also dispersed across several incremental image files) so is as equally likely to encounter a non-correctable surface error and therefore equally robust. An incremental backup set is more susceptible to corruption.In actuality, the restore is completed in a single pass being no slower than restoring a single full image. They will take more time to restore, as the full image is restored, followed by the incremental images.
There are two common misconceptions regarding incremental imaging. The entire incremental backup set must be present for a restore to take place, if the chain is broken you will be unable to restore an incremental backup after this break. Together, compared with only creating full images, this enables you to create many more backup points using the same resources. This keeps the backup files created small, and the time required to create them low. Incremental images work by only backing up the changes that have occurred since the previous backup. Today we will be discussing some of the more advanced options available when performing your backups. Macrium Reflect offers you the tools to provide you with the flexibility to perform backups that meet your needs.
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