Video Screencast Help
Symantec to Separate Into Two Focused, Industry-Leading Technology Companies. Learn more.

Incremental restore of a VM

Created: 23 Oct 2012 • Updated: 23 Oct 2012 | 2 comments

Hi, 

I have problems restoring an incremental backup of a VM whereas restoring from a full VM backup works properly.

My configuration :

  • Physical Server with FC LUN (datastores) attached
  • 1TB for storage disk to backup VMDK
  • VCenter 4.1
  • Host VM Server configured with incrementals based on timestamp
  • My testing VM have ctkEnabled = true and scsci:0:0.ctkEnabled = true

My Policy :

  • I use my 1TB volume storage disk
  • Type : FlashBackup-Windows
  • BLIB activated
  • Snapshot options : 
  •      VM backup : Mapped full VM backup
  •      Transfer type : SAN
  •      Exclude unused and deleted blocks : enabled
  • Schedules :
  •      Full backup
  •      Cumulative Incremental

What I can do :

  • Backup a entire Windows VM with my policy (Full Backup)
  • Backup a Windows VM with the same policy (Cumulative Incremental Backup)
  • Restore a full backuped VM with "Virtual Machine Backups" mode, and "FlashBackup-Windows" policy type (from Full Backup)
  • Restore only files in my VM with "Normal Backups" mode, and "FlashBackup-Windows" policy type

What I can't do :

  • Restore a incremental backuped VM with "Virtual Machine Backups" mode, and "FlashBackup-Windows" policy type (from Incremental Backup). I expect to select my last full and incremental backup (like it works with files), but I can only select one line (Full or Incr).

When I launch Cumul Incr restore, I only have few modified files, but not the others from Full Backup, so I have a great "No operating system found" when it powered on !!

Is it possible to do this ?

Thanks

(sorry for my english, french user here)

Comments 2 CommentsJump to latest comment

sazz.'s picture

What I can't do :

  • Restore a incremental backuped VM with "Virtual Machine Backups" mode, and "FlashBackup-Windows" policy type (from Incremental Backup). I expect to select my last full and incremental backup (like it works with files), but I can only select one line (Full or Incr).

Actually there is no need for it and you are right when you have slected "restore from virtual machine backup" you can't select the full and the incrmental the way we were able to do in file level backup. That is because you can restore the complete vmdk with the BLIB incremantal.

Read the Netbackup 7 Feature overview:

http://symcdata.info/vmworld/assets/Symantec%20Net...

"Besides providing extremely efficient incremental backups, the entire virtual machine can be restored from any type of backup – block level incremental or full. Easy, single step disaster recovery for the entire virtual machine is now a reality"

If you see the screen shot below it shows the same VMDK size for full and incremantal.

full backup.JPG incremental.JPG
Kiabi AdmWin's picture
Thanks for your answer, 
 
I have what your said, full and incr have nearly the same size.
When i boot my VMs after an incr restore, I have a "operating system missing"
 
I have tested with two VMs, i have done a full backup, then a cumul incr backup.
I deleted the VMs and restored the full : VMs work perfectly.
I deleted the VMs and restored the cum incr : VMs are broken (and restore was fast, only 570MB have been restored !!)
 
Here the screenshots (1 to 6, open in full size), how can it be possible ?
 
 
 
1 Full backup task.JPG 2 Cumul Incr backup task.JPG 3 Available restores.JPG 4 Full restore.JPG 5 Cumul Incr restore.JPG 6 Cumul Incr restore task.JPG