HP 828689-002, Руководство пользователя

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Software and configuration utilities 47
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, 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. You
can disable ASR from the System Management Homepage or through UEFI System Utilities.
USB support
Hewlett Packard Enterprise provides both standard USB 2.0 support and legacy USB 2.0 support.
Standard support is provided by the OS through the appropriate USB device drivers. Before the OS loads,
Hewlett Packard Enterprise provides support for USB devices through legacy USB support, which is
enabled by default in the system ROM.
Legacy USB support provides USB functionality in environments where USB support is not available
normally. Specifically, Hewlett Packard Enterprise provides legacy USB functionality for the following:
•
POST (system boot)
•
UEFI System Utilities
•
Pre-boot UEFI shell
•
DOS
•
Operating environments which do not provide native USB support
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, the flashing mechanism 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.