HP hpe proliant dl20 gen9, User Manual

Page: 102 / 131

Software and configuration utilities 102
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 HPE 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 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.
USB support
Hewlett Packard Enterprise servers support both USB 2.0 ports and USB 3.0 ports. Both types of ports
support installing all types of USB devices (USB 1.0, USB 2.0, and USB 3.0), but may run at lower speeds
in specific situations:
•
USB 3.0 capable devices operate at USB 2.0 speeds when installed in a USB 2.0 port.
•
Hewlett Packard Enterprise provides legacy USB support in the pre-boot environment prior to the
operating system loading for USB 1.0, USB 2.0, and USB 3.0 speeds in both the UEFI Boot Mode
and the Legacy Boot Mode.
The pre-OS behavior of the USB ports is configurable in System Utilities, so that the user can change the
default operation of the USB ports. For more information, see the HPE UEFI System Utilities User Guide
for HPE ProLiant Gen9 Servers on the Hewlett Packard Enterprise website
( http://www.hpe.com/info/uefi/docs ).
External USB functionality
Hewlett Packard Enterprise 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 USB options in UEFI System
Utilities.
Redundant ROM support
The server enables you to upgrade or configure the ROM safely with redundant ROM support. The server
has a single ROM that acts as two separate ROM images. In the standard implementation, one side of the
ROM contains the current ROM program version, while the other side of the ROM contains a backup
version.
NOTE: The server ships with the same version programmed on each side of the ROM.
Safety and security benefits
When you flash the system ROM, ROMPaq writes over the backup ROM and saves the current ROM as
a backup, enabling you to switch easily to the alternate ROM version if the new ROM becomes corrupted
for any reason. This feature protects the existing ROM version, even if you experience a power failure
while flashing the ROM.