Checking for AB Partition Slot Support

fastboot — android-tools fastboot get active slot I am trying to root my Xiaom mi a2 phone But i am stuck on changing the active partition When i enter fastboot set_active b it doesnt fastboot get active slot I was able to fix this with fastboot --set-active=a followed immediately by fastboot flash boot and all the other partitions

fastboot_ error_ failed to identify current slot Boot your smartphone into Fastboot Mode · Now, connect your smartphone to the PC using a USB cable · Open a Command Prompt, Terminal, or