Video Screencast Help
Give us your opinion and win with Symantec! Please help us by taking this survey to tell us about your experience with Symantec Connect, so that we can continue to grow and improve.  Take the survey.

Incremental backup of a fixed VM

Created: 20 May 2014 • Updated: 15 Jul 2014 | 3 comments
This issue has been solved. See solution.


When testing the incremental backup of a fixed VM, I found that backup exec undergoes a full backup and not an incremental one. Is there  a work around to let backupup ex perform an incremental backu of a fixed virtual machine?


Operating Systems:

Comments 3 CommentsJump to latest comment

VJware's picture

Incremental backup of VM depends upon factors such hardware version of the VM (must be atleast 7 or above), and Change Block tracking (CBT) must be enabled.

Colin Weaver's picture

Also there can be issue aissue where you have to reset CBT within the VM itself ( so not a Backup Exec root cause). I believe the process to fix is

Shutdown VM

Turn off CBT in settings of VM

Boot up VM

Shutdown VM again after a short time interval

Power up the VM

Run a Full backup (whicc turns CBT back on)

Then run an incremental

lanloun's picture


I am backing a hyper V maachine and not Vmware.