如何預控掛了，
想辦法 在其他預控上 使用 NTDSUTIL 把主機角色都抓過來！
然後查看 netdom query fsmo
再回到 出問題的預控上，敲下面的命令重啓恢復即可！
bcdedit /set safeboot dsrepair
bcdedit /deletevalue safeboot
shutdown -t 01 -r
Afterwards it should reboot in normal mode.
| Value | Description |
|---|---|
/set safeboot dsrepair | Configures the boot process to start in DSRM. |
shutdown –t 0 -r | Shuts down the server and restarts it. |
/deletevalue safeboot | Returns the boot process to the previous setting. |