> > We track zero regions at 4K level, and Cluster size is 64K. > > > > So I normally just use 1bit to store information about empty blocks. > > > > I thought that is quite good, but you obviously have a better idea? > > Maybe I didn't understand right then. These zero regions are just for > describing > empty sectors within non-empty clusters?
I currently also write an entry for empty sectors. But this is only done as additional error check, to prove that the backup tool wrote all data.
