We have Restrospect Small Business Server Premium V7.5.387 running on a Windows 2003 Server. This server is backing up itself with two local drives (c: and d:) an the exchange server.
The backing up of the data drive (d:) and the exchange server works fine and it just takes minutes to finish this process. When it comes to the system drive (c:), the backing up time is ok, but the snapshots takes a very long time (several hours) to be written.
The snapshot is really large (~200 MB) and I compared it to the one from drive d: which contains dramatically more files and folders than the system drive, but this snapshot is round about 30 MB big.
Then I created several subvolume folders for each local folder in the root directory of the system drive and started a backup with the subvolume folders and guess what, then the complete backup process finished in a few minutes including the snapshot.
The question now is, what is going on here? Why does the backup of the local drive takes such a long time, whereas the backup of the subvolume folder finishes in several minutes?
Edit: By the way, It has nothing to do with the tape drive. Backing up to disk also ends up in a slow writing of the snapshots.