Thanks for the prompt reply.

Machine A is an old Buffalo TeraStation. Ironically, it is running Linux & likely even has rsync, but as a practical matter, SMB is the only available access mechanism.

1) You can touch the files, or copy them in such a way that their times change

No shell access to A for "touch". No option I can find via the web interface to have the copies to A take the current time as their creation/mod time, though this would be great, if possible.

2) You can simply run full backups

Performance hit? I understand pooling will avoid creating multiple copies, but cost in backup time?

3) You can switch from SMB to rsync

Love to. I understand there are "hacked" firmware versions for the TeraStation which would allow this, but I'm very reluctant.

I guess I'm mostly surprised that the incremental backup does not realize that there are files in the source that do not exist in the destination & back them up based on that, regardless of modtime.

On Fri, Nov 2, 2012 at 8:53 AM, Michael Stowe <> wrote:

> I'm running backuppc 3.2.1 on Linux Mint 11, backing up a machine (A)
> which
> has SMB (as opposed to rsync/tar/...) as the only available backup
> mechanism.

This is probably something worth reconsidering.

> An initial full backup of A is fine, but a subsequent incremental backup
> does not backup files which were added to A since the full backup.
> It seems clear why, since the 'modtime's of these files are *prior* to the
> time of the full backup: they retained their original
> creation/modification
> times from the source machine (B) when they were copied to A after the
> full
> backup of A. (I do see that the directory structure that would contain
> these new files is created in the incremental backup set, since these
> directories on A are newer than the full backup.)
> backuppc documentation says: "For SMB and tar, BackupPC uses the
> modification time (mtime) to determine which files have changed since the
> last lower-level backup. That means SMB and tar incrementals are not able
> to detect deleted files, renamed files or *new files whose modification
> time is prior to the last lower-level backup*."
> The question: is there any way to have backuppc incrementally backup such
> files, perhaps based on the fact that they do not exist in the full backup
> set?
> Thanks for any assistance/advice!

1) You can touch the files, or copy them in such a way that their times
2) You can simply run full backups
3) You can switch from SMB to rsync

LogMeIn Central: Instant, anywhere, Remote PC access and management.
Stay in control, update software, and manage PCs from one command center
Diagnose problems and improve visibility into emerging IT issues
Automate, monitor and manage. Do more in less time with Central
BackupPC-users mailing list