In order to protect the SQL server using ADBO, both the SQL Agent and ADBO must be installed. ADBO, which can only be installed on Windows 2003, can use different snapshot providers, including hardware and software. You can select the provider to be used through the Advanced Disk-based Backup options when creating the backup job.
If Automatic - Use hardware if available; otherwise use software is selected, the first available the first available hardware provider is used. If a hardware provider is not available, then the first software provider is used. If neither a hardware nor a software provider are available, the job status will depend the job disposition option set on the Advanced Disk-based Backup dialog box.
Also, when using ADBO note the following: