While trying to test a backup from Windows Home Server. A logical drive was backed up using Acronis True Image into an empty logical drive on a different physical drive and created a single .tlb file. Then this file was restored into another empty logical drive a. The restored copy was compared against the original and around 100 files were missing, although the rest compared ok.

The strange thing is that the missing files are all in second level sub-directories of the same sub-directory and there some kind of pattern to the missing files. However, it makes no sense in that most of these files are stable and have not changed for some time, nothing was accessing them during the backups and testing a couple of them shows that the original files are readable.

Just to be sure, erased the .tlb and the restored files and did the process again, same results, same missing files.

And one final precaution, ran a chkdsk against the original logical drive and it’s fine.

(Added - this may not be an Acronis problem - but may show an underlying problem with the directory or structures - to be continued….)