We are having issue to perform VADP backup with EMC² Networker 7.6.2 with a VM which in total equals about 2.3 TB of data.
The setup is the following:
VM (fileserver) running on Windows 2008 R2
The backup server (physical) is running Networker 7.6.2 and is also proxy host for VADP backups.
VMware vSphere ESXi 4.1 Update 1
When we perform an ESX snapshot of the fileserver, no problem.
When we try a VADP backup via Networker, it fails with the following error:
Creating snapshot for 'vm-2153' ...
Task is -1% complete
Task is 95% complete
Task is 95% complete
Task is 95% complete
Task is 95% complete
74854:nsrvadp_save: The following VMware related error occured: Unable to create snapshot '_VADP-BACKUP_' for VM: vm-2153. Details: 'An error occurred for task 'CreateSnapshot_Task'. Details: Operation timed out.'.
80405:nsrvadp_save: Could not create Snapshot for VM 'PWVFILE05'.
Temporary directory 'V:\backupvmware\PWVFILE05' for VADP deleted.
Other client VADP backups (smaller ones) are running fine.
Someone told me that the NBD has certain limits regarding VM Size.
He said when he VM size equals 1TB or more, we should NOT use NBD.
Is anyone able to explain me or provide me with proof of this ?