The HSM driver is custom built for a specific version of the Linux Kernel. This means if the kernel version changes, the driver will not be loaded until it is rebuilt for the new kernel. This usually only occurs if SAKA is rebooted after updating to a newer kernel. It is important to note that after running an update through Yum, the new kernel isn't immediately loaded.

To ensure there are no unexpected issues during future maintenance periods, the appliance should immediately be rebooted and the driver rebuilt after updating the kernel. After rebooting the appliance, run the following steps as the root user to rebuild the driver:

1. Change directory to /usr/local/software/hsm/utimaco.

2. Execute the rebuilt_driver.sh script.

That completes rebuilding the HSM Driver. An example of this process follows.