单项选择题 A system administrator was able to boot a system from the AIX installation CDROM. The migration install was selected, but the process hung at 92% complete. The system administrator then rebooted the system, which subsequently hung at LED 552. Which of the following options is the most probable cause?（）

单项选择题 During a system boot, an error message appears concerning a paging space, paging00. The paging space was located on hdisk2, but the disk was removed from the system without proper software procedures. Which of the following commands should be used as the first step in the process of recovery?（）

单项选择题 Which of the following techniques is used to extract the /usr/tmp directory from a mksysb backup?（）