Hi folks:
I was going to upgrade my S2600CWTS board to Bios R01.01.00009 which was release a few weeks ago, but in the section marked "IMPORTANT NOTICE" point #5 says this:
5. BIOS R01.01.0009 will enable UEFI Secure Boot and include below limitations:
- Please read "BIOS UEFI SECURE BOOT IMPACT AND MITIGATION METHOD" section in this
BIOS release notes
- All customer settings saved in BIOS NVRAM will be lost after new BIOS upgrade.
- BIOS downgrade is not allowed if user has enabled BIOS secure boot. All customer
setting will be lost also if downgrade to previous BIOS release.
- Backup BIOS region is also required to be updated to prevent recovery failure
please use release package to update BIOS.
- There is downgrade hang risk if you don't follow above rules.
- Further BIOS release will not suffer from these side effects as the NVRAM region
is formatted as authenticated variable storage
I need some clarification about what "enable UEFI Secure Boot" means. I'm running ESXi 6 and don't have secure boot enabled. Does this mean that if I apply this BIOS update that I won't be able to turn off secure boot and will have to reinstall ESXi? Also, does it mean that I can't legacy boot from a CD or USB stick any longer? If that's the case, then I'm stuck at the current BIOS level.
Can someone please give some details about what this means relative to how the previous Bios versions operated?
Thanks.