fastboot — android-tools

fastboot get active slot   Dan fastboot get active slot

It may not flash TWRP as there is no active slot not bootable) If it is a slotted device in Fastboot run the command: fastboot getvar

being installed to the opposite partition than you're currently on So active and you can Get active system slot fastboot getvar current-slot fastboot getvar all Get active system slot

9 naga slot Android phones can now have an A and a B partition system for the OS and we can use this fastboot command to check and see which slot is currently active  The inactive slot contains an older bootloader whose anti-rollback version has not been incremented If the active slot is then flashed with a build that fails