Hewlett-packard Development Company, L.P.

Hewlett Packard Enterprise Development LP

Travis D Bishop

Kevin G Depew

A technique includes, in a first phase of a secure boot of a computer system, executing boot code of the computer system to access a first version of a secure boot key database to authenticate driver code. The first version of the secure boot key database stores a key corresponding to a plurality of drivers. The technique includes executing the boot code to automatically prepare the secure boot key database for a second phase of the secure boot in which operating system bootloader code is executed. Preparing for the second phase includes executing the boot code to automatically replace the first version of the secure boot key database with a second version of the secure boot key database, and the second version of the secure boot key database stores a key, which corresponds to the operating system bootloader code. The technique includes in the second phase of the secure boot, executing the boot code to access the secure boot key database to authenticate the operating system bootloader code.

Automatically replacing versions of a key database for secure boots

An apparatus and method to determine if a device error rate equals or exceeds a threshold. In an apparatus embodiment, a system comprises a device, and an interrupt handler executable by a processor. The interrupt handler executes, upon expiration of a time period, to determine if a threshold error rate associated with the device has been equaled or exceeded.

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Houston, TX, United States of America

Travis D Bishop