I would like to understand how Windows Home Server (v1) treats previously-backed-up disk drives, after the Operating System on C:\ has been re-installed, in order to work out whether my Home Server will run out of disk space when I back up a re-installed client PC.
The setup is:
PC (Windows 7)
- C:\ drive
- with 53 GB in use
- just wiped and re-installed over this weekend
- D:\ drive
- with 60 GB of user data
- was backed up by WHS machine 2 days ago
- the files are mostly unchanged
- but the file ownership of every file has changed, due to now being owned by the new user account on the new Windows 7 installation
- I:\ drive
- with 700 GB of user data
- the entire 700 GB was backed up by WHS machine 2 days ago
- again, data is unchanged, but the file ownership of every file has changed, here too
Windows Home Server (v1)
- "Server Storage" reports that it has 593 GB free
My question is: is the WHS Backup system going to:
- See the D:\ and I:\ drives as totally new (either because it doesn't recognise identical files, or because the ownership has changed), and take a fresh copy of their 760 GB, thereby totally filling up
- Recognise that it has backed up the contents of these drives before, and only backup the 50 GB or so on the C drive, thereby giving me a few more months of backup capacity before I need to add more storage space?
I would particularly welcome a reply from anyone who has done this process before, and has actual experimental evidence of the answer!