I just started using VADP for VM backups. Before, I was using the tradtional method of backing up my VMs. When I use VADP, some of my VM backups always do a FULL backup and some do a FULL and INCR. I cannot seem to figure what why some do a FULL backup every day. This is my environment:
Windows 2003 Networker server running 7.6.2.7
A physical Windows 2003 VADP Proxy Server running 7.6.3
A VM Windows 2008 R2 vCenter running 7.6.3
Has anyone seen this? Please let me know if more information is needed.
Panwar - Schedules are correct and other VMs in the group are getting current backup levels. FULL on days when a FULL should run and INCR on days when INCR should run.
Bobby - I will check the daemon.raw file. The VMs that are running a FULL everyday have had a successful FULL backup previously.
I was researching this issue and I came across a VMware article. It talks about Change Block Tracking (CBT) and making sure it is enabled on the VMs. I have not had a chance to check that as I have to shutdown the VM to look at its configuration parameters in vCenter. Once I check if CBT is enabled or disabled, I will post results.
Check the daemon.raw on the server also to see if it tells you why it's doing a full - for example it may tell you "No full backups of this save set were found in the media database".
I found a VM that I could play with. I have a Windows 2003 VM and it runs a FULL VADP backup every time, even if it already had a succesful FULL backup. Following the VMware KB article - 1031873, I enabled CBT on the 2 virtual drives. Rebooted the VM and kicked off a backup again. It ran a FULL again. The strange thing...When I look at the Save Seesion Details, it shows the Level as FULL. When I look at the Group Detail, the level is shown as Inc. See attached pics.
Incr backups are only supported for Windows VMs. IF a windowVM is only doing FULL backups then you need to check if there are files in VM containing ASCII charctors.
From Networker VADP integration guide:
Note:
When Changed Block tracking (CBT) is enabled, incremental and differential backups are
supported only for Windows virtual machines, and all attached disks must be NTFS file
systems.
Note also that CBT-based incremental backups are always file based. Image level recovery from
I did read about the Unix / Linux VMs and how they do a FULL everytime based on the non-NTFS image which is OK. This made me think about the Windows VMs that are getting a FULL everytime. I looked at the savegroup completetion email that I get from the system and observed something interesting.... The test VM that I am working on, along with other production Windows VMs that are getting a FULL backup show the image as non-NTFS. Very strange. I checked the VM and the drives are NTFS partitioned. Cannot explain why this is. See below:
nj06nt015:*FULL* savegrp: suppressed 63 lines of output.
* nj06nt015:*FULL*
* nj06nt015:*FULL* Reading 7676Total Number of Virtual Disks read is 2.
* nj06nt015:*FULL* Completed save operation of the non-NTFS Image.
coganb
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Posted January 18th, 2012 23:00
Hi,
This is a known issue which is described here:
http://solutions.emc.com/EMCSolutionView.asp?id=esg122056&usertype=C
-Bobby