It is currently required to create a non-privileged user named bkbusr and add it to a group called bkbgrp in order to install and run NetVault: Smartdisk.
To accomplish this requirement, please do the following:
1. Create the non-privileged (Standard) user 'bkbusr' via System Preferences -> Accounts
2. Use the 'dseditgroup' command to create the group 'bkbgrp' and add the user
'bkbusr' to it as follows...
sudo dseditgroup -o create bkbgrp
sudo dseditgroup -o edit -a bkbusr -t user bkbgrp
You should now be able to run the NVSD installer successfully.
Please refer to the text above