LDM volumes and status code 1
If a virtual disk has been configured for Logical Disk Manager (LDM) volumes, and the NetBackup policy specifies the option, note: in certain cases a backup of the virtual machine may not complete. The NetBackup job may issue status 1, "the requested operation was partially successful." This error can occur if the controller type of the .vhd disk was SCSI when the disk was formatted but the controller type was later changed to IDE (or vice versa).
In this case, the NetBackup progress log may contain the following message:
ERR - Unable to retrieve volumes from virtual machine, error = 1
You must restore the controller type of the .vhd disk to the controller type originally assigned before the LDM volume was created. Then retry the backup.