戴尔C6100. 简历1.81. 骨科1.2（2011）
当尝试使用 DELL 提供的固件和实时启动 CentOS 软件更新 BMC 固件时，我无法停止该服务ipmi。因此更新失败。
我努力了：
CentOS live boot, unable to kill process. - using modprobe -rf Ubuntu 16 LTS, unable to kill process. - using modprobe -rf WebGUI Update (megarac), image failed verification. - image confirmed to be true from dell racadm Failed to connect to IPMI. - IPMI user reset password and name works and confirmed. Still no access. - using racadm -c FREEDOS, Unable to run program. using .exe firmware from dell
问：当所有方法都失败时，我该如何更新 BMC 固件？