Incremental backup on Backup Exec 2010 byte count increased dramatically without explanation
I'm running Backup Exec 2010 in a Server 2008 environment. We run a full backup once a week and run an incremental job to backup the changed files on the other weeknights, A full backup byte count is typically 7.6 TB and the incremental ranges between 120-160GB growing in size as the week goes on.
Last week on the Thursday backup the incremental size increased without warning or explanation. The Wednesday backup was 134GB and the Thursday backup was over 2 TB. The following nights backup was 2.5TB. The fulll backup at the weekend was 7.6TB which was the normal expected size.
The daily incremental last night was 1.6TB.
We have not added any large amount of data or made software changes. I have no explanation for this. Any ideas or suggestions?
I have attached a screenshot of the recent backup job activity.