You can acquire full system backup with Wbadmin command
wbadmin start backup -allcritical -backuptarget:e:
where location is the drive letter or path to the target drive. Also, you use the -quiet option to avoid having to type Y for the operation to proceed
Related Articles:
- Full System Backup in Windows Server 2008 R2
- Scheduling Backup in Windows Server 2008 R2
- System State Recovery on Windows Server 2008 R2