unable to backup new FS in schedule mode

Hello,

We are not able to backup new FS when they get created!

Let me show you the timeline:
|
|
|-20:20 previous backup finished
|
|-20:21 few moment after the scheduler tell us that the next backup will happen
| at 20:00 tomorrow
|
…
…
|-midnight
…
…
|
|-19:00 we destroy the FS which are mounted somewhere under /dolly/backup
|-19:05 we create some new FS which are mounted somewhere under /dolly/backup
|
|-20:00 the scheduler starts and the FS newly mounted under
| /dolly/backup are not backup at all. This is sad, because we are only
| interested in this FS
|
|-20:05 the scheduler finished… and nothing get backup :(
|
|-20:06 few moment after the scheduler tell us that the next backup will happen
| at 20:30 tomorrow
|
v

What can be done. Is there a way to tell the scheduler to backup this file ?