单项选择题 An administrator has mirrored the root volume group to a second disk, but bootlist is failing to correctly add the second disk. What is the likely cause of the problem?（）

单项选择题 Which reference code is displayed during the boot process that signals that an administrator may interrupt the boot process to enter the SMS Menu?（）

单项选择题 Which command shows all the paging spaces available on a system?（）