I have tried to download the OS driver pack many times and it fails, stating
"Critical -> Firware Update -> Update Failed: OS Driver Pack"

I saw on a different post from joblink that it is necessary to go to Repurpose & Retire -> and uninstall everything to default settings, then the OS driver pack upgrade works. This did not work: os driver pack and diagnostic were uninstalled successfully (though cannot get either to install back now), while the BIOS and iDRAC do not go back to default settings. The server seems to reboot before either can complete reverting to default version.

Current BIOS version is 2.9.0 , iDRAC is 2.65.65.65