Sun Microsystems Enterprise 250 Owner's Manual page 22

Thermal sensing and over-temperature protection
Power system monitoring and fault protection
N+1 power supply redundancy
Hot-swap power supplies with easy rear access
Automatic system recovery
Four levels of system diagnostics
Easy front or side access to all internal replaceable components
Remote System Control (RSC)
For additional details, see "About Reliability, Availability, and Serviceability
Features" on page 40.
4 Sun Enterprise 250 Server Owner's Guide • June 1998