WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy). .

问题描述：

使用partprobe重新读取分区表出现错误：

Warning: WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy).  As a result, it may not reflect all of your changes until after reboot.
Warning: Unable to open /dev/sr0 read-write (Read-only file system).  /dev/sr0 has been opened read-only.
Warning: Unable to open /dev/sr0 read-write (Read-only file system).  /dev/sr0 has been opened read-only.
Error: Invalid partition table - recursive partition on /dev/sr0.

解决办法：

1、如果是用虚拟机登录的linux，请将系统中的光驱卸载

重新输入partprobe错误：

Warning: WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy).  As a result, it may not reflect all of your changes until after reboot.

解决办法是重新启动虚拟机。

虚拟机启动后，问题解决。

这个是自己出现的问题所解决的办法，给大家分享下。