Diagnostic tools  72 
•  RBSU   
•  Diagnostics   
•  DOS   
•  Operating environments which do not provide native USB support 
 
Internal USB functionality 
An internal USB connector is available for use with security key devices and USB drive keys. This solution 
provides for use of a permanent USB key installed in the internal connector, avoiding issues of clearance on 
the front of the rack and physical access to secure data. 
 
External USB functionality 
HP provides external USB support to enable local connection of USB devices for server administration, 
configuration, and diagnostic procedures. 
For additional security, external USB functionality can be disabled through RBSU. 
 
Automatic Server Recovery 
ASR is a feature that causes the system to restart when a catastrophic operating system error occurs, such as 
a blue screen, ABEND (does not apply to HP ProLiant DL980 Servers), or panic. A system fail-safe timer, the 
ASR timer, starts when the System Management driver, also known as the Health Driver, is loaded. When the 
operating system is functioning properly, the system periodically resets the timer. However, when the 
operating system fails, the timer expires and restarts the server. 
ASR increases server availability by restarting the server within a specified time after a system hang. At the 
same time, the HP SIM console notifies you by sending a message to a designated pager number that ASR 
has restarted the system. You can disable ASR from the System Management Homepage or through RBSU.