Ubuntu 无需重新启动即可重新挂载已更改为 ro as rw 的根挂载

Question

由于errors=remount-ro底层 NFS blip 导致我的根挂载被重新挂载为只读。我知道我没有什么需要担心的。如何在不重新启动服务器的情况下将其重新安装为 rw？

一些测试：

simon@steve:~$ sudo hdparm -r /dev/sda1

/dev/sda1:
 readonly      =  0 (off)
simon@steve:~$ sudo blockdev --setrw /dev/sda1
simon@steve:~$ sudo blockdev --setrw /dev/sda
simon@steve:~$ sudo hdparm -r /dev/sda1

/dev/sda1:
 readonly      =  0 (off)
simon@steve:~$ sudo hdparm -r /dev/sda

/dev/sda:
 readonly      =  0 (off)
simon@steve:~$ sudo mount -o remount,rw /
mount: cannot remount block device /dev/sda1 read-write, is write-protected

Answer 1

mount -o remount,rw /mountpoint