Hello Christophe,
To check that only I have scheduled an incremental backup for today to see changes in data size.
Now for your second question how I am going to restore data at DR taken from production cell manager.
I am taking all the backup on disk using StoreOnce software. The disk storage for me is MSA P2000 at both Production and DR end. Now after the backup, using the replication license I am replicating my LUN from production storage to DR storage. After replicaion gets completed export that image and map it with DR cell manager. So at this particular time I will have the same storeOnce library data at DR storage.
After this I am moving IDB of production CM and restoring at DR cell manager manually. change the cell manager name to DR CM, omnidownload the library and devices, edit the CM name to DR CM and then upload it back, also copy the system.bak file of storeOnce software and paste it inDR CM.
After all these I am able to restore my data taken from production CM and restore in DR CM or clients.
regards