Dell iDRAC6 User Manual page 328

NOTE:
You must have Execute Server Action Commands permission to perform
power management actions. See "Adding and Configuring iDRAC6 Users" for help
configuring user permissions.
1 Click System, then click the Power Management→ Power Control tab.
2 Select a Power Control Operation, for example Reset System (warm
boot).
Table 20-12 provides information about Power Control Actions.
3 Click Apply to perform the selected action.
Table 20-12. Power Control Actions
Power On
System
Power Off
System
NMI
(Non-Masking
Interrupt)
Graceful
Shutdown
Reset System
(warm boot)
Power Cycle
System (cold
boot)
See Power Monitoring and Power Management
"
328
Recovering and Troubleshooting the Managed System
Turns on the system power (equivalent to pressing the power button
when the system power is off).
Turns off the system power (equivalent to pressing the power button
when the system power is on).
Sends a high-level interrupt to the operating system, which causes
the system to halt operation to allow for critical diagnostic or
troubleshooting activities.
Attempts to cleanly shut down the operating system, then powers off
the system. It requires an ACPI (Advanced Configuration and Power
Interface) aware operating system, which allows for system directed
power management.
NOTE:
A graceful shutdown of the server operating system may not be
possible when the server software stops responding, or if you are not
logged as an administrator at a local Windows console. In these cases,
you must specify a forced reboot instead of a graceful shutdown of
Windows. In addition, depending on the version of the Windows OS,
there might be a policy configured around the shutdown process that
modifies shutdown behavior when triggered from iDRAC6. See
Microsoft's documentation for the local computer policy "Shutdown:
Allow system to be shut down without having to login."
Reboots the system without powering off (warm boot).
Powers off, then reboots the system (cold boot).
for more information.
"