Hi,
We would like implement VM backup in such a way that VM's on SAN environment should use SAN mode and VM's on local data store should use NBD transport mode. The problem here is that using VDDK does not provide an option to know whether VM is residing on SAN or local datastore, so we can not specify the correct transport mode during VDDK connect.
By default VDDK connect provides "san:hotadd:nbdssl:nbd" transport modes. VixDiskLib_Open API will first try to open the disk using SAN mode. If it fails, then it will fall back to NBD mode. In successful cases, this method suites to our implementation. But in failure cases like proxy server(VDDK installed machine) has no access to SAN environment, the above approach will backup VM on SAN environment using NBD mode. This is because VDDK itself fall back from SAN to NBD mode as proxy has no access SAN environment. In this case, We want backup to be failed instead of using NBD mode for backup.
VDDK connect with san transport mode will resolve this problem, but VM's on local datastore will not be backed up.
So please provide us some suggestion/procedure to implement VM backups as requested.
Thanks in advance.
Thanks
Anand