BIOS Update and System Image Question


  1. Posts : 75
    Windows 10 Home 64-bit (21H1)
       #1

    BIOS Update and System Image Question


    Do BIOS updates save anything important to your hard drive that should be captured in a system image? I used to think that only the BIOS chip was updated, but now with BIOS recover options I知 not sure anymore. Where is the BIOS recovery data saved?
      My Computer

  2. Ghot's Avatar
    Posts : 15,937
    Win 10 Home 10.0.19044.1469 (x64) [21H2]
       #2

    radiowaves said:
    Do BIOS updates save anything important to your hard drive that should be captured in a system image? I used to think that only the BIOS chip was updated, but now with BIOS recover options I知 not sure anymore. Where is the BIOS recovery data saved?


    BIOS updates and recovery are saved on the BIOS chip. Some motherboards, like Gigabyte, may have two BIOS chips.
    NOTHING of the BIOS is saved to the hard drive(s).

    On a side note: Most motherboard BIOSes have profiles also. Usually 6-8 profiles so you can save sets of BIOS settings.
      My Computer

  3. Bree's Avatar
    Posts : 22,756
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #3

    radiowaves said:
    Do BIOS updates save anything important to your hard drive that should be captured in a system image? I used to think that only the BIOS chip was updated, but now with BIOS recover options I知 not sure anymore. Where is the BIOS recovery data saved?
    Ghot said:
    BIOS updates and recovery are saved on the BIOS chip.... NOTHING of the BIOS is saved to the hard drive(s).
    Actually for some modern systems that is not entirely true. Dell for example can store a bios recovery file in the EFI partition. But as you'd need to back up the EFI partition anyway when making a system image that could restore Windows, then there should be nothing further you need to be aware of.

    Dell said:
    Where is the BIOS Recovery File?
    1. For those computers that support BIOS recovery, the BIOS recovery file will already be on the computers Hard Drive (hard drive) in the ESP/EFI Partition.
    2. If the BIOS Recovery file is NOT found on the hard drive, it could be that:
      1. Your hard drive has been replaced since it left the factory.
      2. You have changed your BIOS from UEFI to Legacy boot.
      3. You have reimaged your computer since receiving it from the factory.
      4. You have reinstalled the computer with a new operating system and formatted the hard drive.

    3. If your computer is in a working state, you can add the BIOS Recovery file back to the hard drive, by reflashing the BIOS. (Even if you are putting the same revision back on, that it is flashed to.) Remember that for this to work the BIOS has to be set to UEFI and the operating system must be at least Windows 7 64 bit or a more recent revision.
    Dell Support | How to Recover the BIOS on a Dell Computer or Tablet

    HP do the same, though they don't document where the recovery file is stored. The EFI partition would be the only logical place as that is the only partition accessible by rudimentary bios functions.

    HP said:
    Recover the BIOS using a key press combination
    Many HP computers have an emergency BIOS recovery feature that allows you to recover and install the last known good version of the BIOS from the hard drive, as long as the hard drive remains functional. This emergency recovery feature is separate from the BIOS and is designed to work in the event of a catastrophic BIOS failure.
    Desktop: https://support.hp.com/us-en/documen...820-3438449-16
    Laptop: https://support.hp.com/us-en/documen...413-2337994-16
    Last edited by Bree; 14 Oct 2021 at 21:17.
      My Computers

  4. Ghot's Avatar
    Posts : 15,937
    Win 10 Home 10.0.19044.1469 (x64) [21H2]
       #4

    DELLs and HPs are just pretend computers.




    BIOS Update and System Image Question-doc-brown-prebuilt.png
      My Computer


  5. Posts : 75
    Windows 10 Home 64-bit (21H1)
    Thread Starter
       #5

    Bree said:
    Actually for some modern systems that is not entirely true. Dell for example can store a bios recovery file in the EFI partition. But as you'd need to back up the EFI partition anyway when making a system image that could restore Windows, then there should be nothing further you need to be aware of.

    Dell Support | How to Recover the BIOS on a Dell Computer or Tablet

    HP do the same, though they don't document where the recovery file is stored. The EFI partition would be the only logical place as that is the only partition accessible by rudimentary bios functions.

    Desktop: https://support.hp.com/us-en/documen...820-3438449-16
    Laptop: https://support.hp.com/us-en/documen...413-2337994-16
    If you restore a system image that was taken before a BIOS update was done, will you lose any recovery information for that BIOS version? I use Macrium Reflect and always image all partitions.
      My Computer

  6. Bree's Avatar
    Posts : 22,756
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #6

    radiowaves said:
    If you restore a system image that was taken before a BIOS update was done, will you lose any recovery information for that BIOS version? I use Macrium Reflect and always image all partitions.

    Yes, you would. But the EFI partition in your image may well have a previous bios recovery file in it. If so, in the unlikely event that you needed to recover your bios then it would recover to an earlier version.
      My Computers


  7. Posts : 75
    Windows 10 Home 64-bit (21H1)
    Thread Starter
       #7

    Bree said:
    Yes, you would. But the EFI partition in your image may well have a previous bios recovery file in it. If so, in the unlikely event that you needed to recover your bios then it would recover to an earlier version.
    This is interesting. Would it be correct to say that you should take BIOS updates into consideration when making your backup plans? Depending on your system's BIOS recovery options, you may not want to restore to an image taken before a BIOS update, unless you are OK with the recovery data being out of sync or missing altogether. Therefore, you should make a system image right after a BIOS update and try not to use any older ones. Is this correct? I have not seen it discussed before.
      My Computer


 

  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

ゥ Designer Media Ltd
All times are GMT -5. The time now is 22:13.
Find Us




Windows 10 Forums