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IBM BladeCenter HX5 Implementation Guide

IBM BladeCenter HX5
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318 IBM eX5 Implementation Guide
Figure 7-15 PCIe slot speed selection panel to force Gen1 compliance
Non-UEFI adapters in an UEFI environment
A number of Gen1 PCIe adapters were designed prior to the implementation of UEFI. As a
result, these adapters are not recognized or might not have UEFI drivers that allow the
adapter to function in an UEFI environment.
The server supports these non-UEFI adapters via a setting Legacy Thunk Support, which is
enabled by default. Legacy Thunk Support mode places the non-UEFI-aware Gen1 adapter
into a generic UEFI wrapper and driver, which allows you to update the firmware of the
adapter to support UEFI.
We recommend that all installed adapters either support UEFI as standard or be updated to
support UEFI, because Thunking only provides limited support for non-UEFI adapters in an
UEFI environment. For example, a legacy adapter in a Thunk UEFI wrapper cannot be seen
in System Settings ï‚® UEFI Adapters and Device Drivers, nor can it natively access
memory locations above 4 GB.
If you have previously disabled Thunking, you can re-enable it by using F1-Setup and
selecting System Settings ï‚® Legacy Support. Figure 7-16 on page 319 shows the Legacy
Support panel.

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IBM BladeCenter HX5 Specifications

General IconGeneral
BrandIBM
ModelBladeCenter HX5
CategoryServer
LanguageEnglish

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