HP ProLiant ML310 G2 Server - Manual (Page 71)

Server Software and Configuration Utilities 71
USB Support
HP provides both standard USB support and legacy USB support. Standard
support is provided by the operating system through the appropriate USB device
drivers. HP provides support for USB devices before the operating system
loading through legacy USB support, which is enabled by default in the system
ROM. HP hardware supports USB version 1.1 or 2.0, depending on the version
of the hardware.
Legacy USB support provides USB functionality in environments where USB
support is normally not available. Specifically, HP provides legacy USB
functionality for:
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POST
RBSU
Diagnostics
DOS
Operating environments which do not provide native USB support
For more information on ProLiant USB support, refer to the HP website
(
http://h18004.www1.hp.com/products/servers/platforms/usb-support.html ).
Internal USB Functionality
An internal USB connector is available for use with USB drive keys only. The
internal connector shares the same bus with the front external USB connector,
and connecting a device to both the front internal and front external USB
connectors is not supported. This solution provides for use of a permanent boot
drive from a USB drive key installed in the front internal connector, avoiding
issues of clearance on the front of the rack and physical access to secure data.
For additional security, you can individually disable the front, rear, and internal
USB connectors through RBSU. Disabling the rear USB connectors in RBSU
disables both rear USB ports.