Hello! I have not clear how Acronis TI8 implements this? Where it stores information about changed sectors? And what happened when I make some changes into partition while operating-system is not loaded? Then TI8 probably never find out that changes are made into partition. Example I make some canges into partition OS offline, example change 10 sectors. Then makes some changes OS online, example 4 sectors into the same area. TI8 then only knows about those 4 sectors change. Now I make incremental backup and only 4 sectors of 10 are backuped. When I restore partition, then 4 sectors of 10 are restored correctly, but 6 sectors restored from old bacup-set. Those 10 sectors all must be one unit but after restore it isnt anymore. Relationship between those 4 and 6 sectors are broken - this becomes serious filesystem inconsistency. Wow about this ? Ivar.