BtdDurand
on Jan 6, 2025

I'm currently using Rauc on a SOM running a Renesaz RZ/G2L processor with u-boot as bootloader.
Everything works fine but I was able to boot on the fallback partition while my current partition is good:

    my current partition has been marked as good by the status mark-good command
    my equipment reboots
    u-boot decrements the BOOT_X_LEFT variable
    a power failure occurs before the status mark-good command
    if this power failure occurs several times, BOOT_X_LEFT is equal to 0
    on the next boot, the equipment boots on the fallback partition

Does Rauc include a safety feature to prevent booting on the fallback partition when the current partition is good?
Answered by a3f
on Jan 26, 2025

prevent-late-fallback=true has been introduced in the recently merged #1584
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Replies: 1 comment · 3 replies

a3f
on Jan 26, 2025

prevent-late-fallback=true has been introduced in the recently merged #1584
3 replies
@BtdDurand
BtdDurand
on Jan 27, 2025
Author

Ok, thank you very much.
@ejoerns
ejoerns
on Jan 27, 2025
Maintainer

@BtdDurand Depending on your needs, you could also set BOOT_X_LEFT to a higher value. Then it would need more power failures in a row to fall back.

An alternative implementation we have in mind is to allow disabling all boot counting once the system has successfully booted.
However, this has other implications, too.

In general, it's a general question of whether you need a fallback or not. Fallback handling has implications on availability, security, consistency, etc.
@BtdDurand
BtdDurand
on Jan 27, 2025
Author

@ejoerns Thank you for these clarifications.
I added the command rauc status mark-bad other after rauc status mark-good and everything works fine.
Answer selected by BtdDurand