Moving Fastboot to Userspace

This command provides information about the active slot from which the device is currently booting user $ fastboot getvar current-slot Dump

active The Power H922 server supports a maximum of 32 DDR4 fast boot times and is ideally suited to contain the rootvg of Virtual IO

fastboot get active slot 查詢目前使用那個槽， 看目前的slot是a還是b，一般都是a。1$ sudo fastboot getvar current-slot 參考 adb

fastboot change slot If you are looking to get this job done via Fastboot Commands, then Slots