Examtopics

Here are some tips to help troubleshoot your persistent boot disk if it doesn't boot. Examine your virtual machine instance's serial port output. An instance's BIOS, bootloader, and kernel will print their debug messages into the instance's serial port output, providing valuable information about any errors or issues that the instance experienced. Enable interactive access to the serial console. You can enable interactive access to an instance's serial console so you can log in and debug boot issues from within the instance, without requiring your instance to be fully booted. Validate that your disk has a valid file system. If your file system is corrupted or otherwise invalid, you won't be able to launch your instance. Validate that the disk has a valid master boot record (MBR). If your virtual machine won't boot at all, then you can't use SSH to connect to it because the SSH server on the VM won't be running. Increasing the CPU and memory on the instance might help if the VM boots partway, but not if it can't boot at all. Reference: https://cloud.google.com/compute/docs/troubleshooting#pdboot