Linux qemu启动内核rootfs挂载失败VFS: Cannot open root device问题解决方案

rootfs挂载失败

But using this QEMU emulation setup I tried to produce minimal examples of every possible failure type to help you debug your problem.

In that simple setup, QEMU emulates a system with:

• a single virtio disk which represents a hard disk or SDD of real hardware
• that virtio disk has a raw unpartitioned ext4 image in it. In normal operation, that device would appear under /dev/vda (v is the indicator letter for virtio, if it were partitioned the partitions would be /dev/vda1, /dev/vda2, etc.)

The possible errors you could get are:

1. Linux cannot read bytes from the disk.

   This could be either because the disk is broken, or be