An incremental backup policy configured to protect the data disk of a Microsoft Exchange server
runs once every 2 hours. This policy is configured with 48 generations, and the first full backup
was done on Sunday to the server. On Monday, Tuesday, and Wednesday, the total size of
incremental backup resulted in a backup of 50 MB for each snapshot. On Thursday the 2 a.m.
backup was noted to be 5 GB by the IBM Tivoli Storage Manager FastBack (TSM FastBack)
Status Monitor, and was still a backup type of Incremental. Assuming that no software was
installed or removed on the server, and that there was no change in usage patterns by users on
Thursday, what is the likely cause of the increased backup?

A.
The server was rebooted.

B.
The TSM FastBack client was restarted.

C.
Exchange scheduled maintenance has defragmented the databases.

D.
TSMFastBack scheduled a full backup, because the policy has 48 generations, and the full
backup taken on Sunday expired.