Hello,
We apologise for the delay in responding to your query. AOFO installes the vsp.sys driver which is responsible for the AOFO operations. Refer to the following technote that will explain the procedure to check if AOFO was installed on a system:
Title: How to check for the presence of the Backup Exec 9.x and 10.0 Advanced Open File Option on a remote machine
http://support.veritas.com/docs/256481
Hope that helps. Rever in case you have any more questions on this issue.
Note : If we do not receive your reply within two business days, this post would be marked ‘assumed answered’ and would be moved to ‘answered questions’ pool.
Regards.