Enviroment:Jetson Xavier Nx，R3273
I want to verify the A/B rootfs boot OK.
the Jetson Xavier Nx is rootfs mode：unified bootloader and rootfs a/b is enabled
Now the system is in Slot A。
nvbootctrl get-current-slot,the return value 0;
then I use “dd” command to destroy the section “/dev/mmcblk0p1”. This whole command “dd if=/dev/zero of=dev/mmcblk0p1 bs=1M count=1”
later,I turn off the power and turn on the power,and the boot is failed in slot A and hang，but the system don’t fall-back to slot B and restart boot.
I desired the system in slot A boot failed.but after boot retrysometimes,the system will boot from slot B. but the reality is not,I want to know why??? what should i do to switch to the good slot(B)。
what are the difference between reboot(warm boot) and power on/off(cold boot)?
what things does the operation(power on/off) influence?which power supply?
by the way ,how about boot with the reset gpio? is the same with reboot(warm boot)?
now i describe three ways to restart target board?" what kind of way should i use to restart the target device?
just double confirm you’re given -t rootfs options to check RootFS status.
for instance,
here’re our commands to set RootFS active slots, and issue a reboot for testing. $ sudo nvbootctrl set-active-boot-slot 1 -t rootfs $ sudo reboot
hello JerryChang
I did the command “nvbootctrl set-active-boot-slot 1 -t rootfs”,the print is “Warning unified bootloader and rootfs a/b is enabled,can NOT inquiry rootfs info!”
after I use the dd command to destroy the mmcblk0p1(slot 0),later i can’t input the reboot command instruction. maybe the root file system is corruption, is there no reboot instruction in slot 0 ?
all right, please setup serial console to gather complete UART logs, it shall reboot several times and finally boot into slot-B.
you may press the reboot button, or power-off/on to reboot the target.