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RPI4 Boot Order SSD First, Then SD if SSD Fails
#1
Question 
Hello,

I've had my OP booting reliably from an SSD for several months now.  A little while back, I found a wiki explaining how to change the boot order, add network boot, etc.  I can't seem to find it now, when I want to make a change.

I plan to keep a mirror copy of my SSD on the SD in the Pi as a backup.  If for some reason the SSD fails, all it will take is a restart and the Pi will be able to boot from the SD until I can open my project up and FIX the problem.  

In the default configuration of the Pi firmware, if there is an SD card, the Pi will boot from it and ignore the SSD.  The line in the firmware setting boot order is: BOOT_ORDER=0xf41.

I'd like to change it to: BOOT_ORDER=0xf14, so that during boot, the Pi will FIRST check if a bootable SSD is found and if so boots from the SSD.  If no bootable SSD is found, the Pi will boot from the backup SD.

My problem is that I can't find the wiki showing how to make this change.  Anyone with knowlede, please share.

jamieFL
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RPI4 Boot Order SSD First, Then SD if SSD Fails - by jamieFL - 2020-10-02, 02:07 PM

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