Method and device of backup or recovery of BIOS for blade server

The invention discloses a method and device for backup or recovery of a BIOS for a blade server. The method comprises the steps that 1, after a machine case management controller is initialized, a first FLAG signal is assigned as a preset value; 2, the machine case management controller sends the first FLAG signal and a second FLAG signal together to a substrate controller to inform the substratecontroller of updating a mirror, wherein an ID number of a blade is set on the second FLAG signal; 3, the machine case management controller receives feedback information of the substrate controller,and according to the feedback information, the backup or the recovery of the BIOS is achieved. Through the interaction of the substrate controller and the machine case management controller, the backup and the recovery of the BIOS for the blade server are achieved. 本发明公开了种用于刀片服务器的BIOS的备份或恢复的方法和装置，该方法包括：步骤S1，机箱管理控制器初始化完成后，将第FLAG信号赋值为预设值；步骤S2，机箱管理控制器将第FLAG信号和第二FLAG信号并发送给基板控制器，以通知基板控制器进行镜像更新，其中，第二FLAG信号上设有刀片的ID号；步骤S3，机箱管理控制器接