2019-08-08 有關升級EMUI9.1的注意事項

在XDA上爬到的注意事項

大意是說，如果在 EMUI9.0 時已經利用magisk進行ROOT的機友，在升級9.1時要特別注意，很有可能一個重開機就把手機給格式化了

比較保險的作法是先刷回原廠未修補的映像檔，進行升級後，再行root

附註來自ant0大大的溫馨提醒：
Oh yeah, since you have to boot to recovery to initiate it... 9.1 is a little different. It refuses to boot to recovery when holding volume up. So from a booted system use 'adb reboot recovery' from a command prompt. That should boot into Magisk. Alternatively you can boot to eRecovery and select the Wipe/Factory reset button, it will reboot to normal recovery which will lead to Magisk system. First option is safer though if you forgot to flash patched ramdisk xD