I have encountered a few cases where due to abnormal shutdown (power failure or cold boot) the Linux server cannot be restarted normally and enters GRUB.

Although I found some articles that describe how to fix this boot area problem, but I don’t know the principle of this error occurring, nor do I know how to manually recreate this problem. Is there a way to put a Linux virtual machine in an accurate “off-damage” state?

I try to ask this questions from google, bing and some ai. I found some articles how to fixe the problem. But I don’t found how to recurrence it.