Updating image u boot
First, consider the sections of the memory system (Figure 1) and parts of memory that should be updated while transferring software to a new version.
Typically, a Linux-based system has the following structure of volatile memory.
The second-level loader (for example, U-Boot) copies the Linux kernel to RAM and hands over control to it.
Finally, the system launches custom applications stored in the last section of the Flash memory.
If you perform the update process using a program in the OS, you can copy the necessary files from the server using the wget application or the libcurl library.
This happened today for me at a customer when we were upgrading the hierarchy. Copy and paste the newly renamed into the same location. In the Image ID column you’ll find the Package ID value that should be used in the above Power Shell command. The is located in the location below, if you’ve installed Windows ADK 8.1 in the default location: C:\Program Files (x86)\Windows Kits.1\Assessment and Deployment Kit\Windows Preinstallation Environment\amd64\en-us 4. You’ll get some output when the command has finished.
Rename it so that it reflects the boot image for the site, e.g. In the Image ID column you’ll find the Package ID value that should be used in the above Power Shell command.
Copy and paste the newly renamed into the same location. The Package ID can be found if you go the Software Library node, expand Operating Systems, select Boot Images and select the Boot image (x64).
After that, you can erase and rewrite Flash memory.
Obviously, this option does not allow the system to restore to the previous firmware in the event of an update process failure.
Unfortunately it does not really reveal the all of the steps in detail, so I decided to outline them a bit more. In my lab environment that location is at D:\Config Mgr\OSD\boot\i386. Rename the to bak and then rename the boot image named something like boot. Awarded as Power Shell Hero in 2015 by the community for his script and tools contributions.