标签：Unable to mount root fs on unknown-block

kernel panic-not syncing:VFS:Unable to mount root fs on unknown-block

商家反馈的信息，某用户主机无法访问，经vnc查看系统未能正常启动进入，提示信息为：kernel panic-not syncing:VFS:Unable to mount root fs on unknown-block，主机为CentOS...