Delta restore is now available!!!!

[al3x]

In fact, there is another problem with using changed block tracking driver, there is no way to track block changes in Linux, unless the backup software provides a changed block tracking driver for Linux.

Then Macrium probably uses a combination of both, CBT and timestamp method, to track changes. After making changes from within Linux, the first backup always takes forever for which their timestamp method implementation is probably to blame.

But still, HBS is faster than Reflect in comparing changes in incremental and differential backups (at least in v8, never tried v10), so it doesn’t really matter. And programs that would update sectors on the disk without touching timestamps hopefully don’t exist. I know of some old software activation methods that stored activation data hidden in some sectors on the disk, but that’s hopefully a thing from the past.