单项选择题 A system was rebooted and is taking a long time toreturn. The administrator has logged into the HMC and sees reference code 0c9. What does this mean?（）

单项选择题 After mirroring rootvg, a system administrator wantsto validate that the system will boot correctly. Which of the following tasks must be performed before changing the boot order?（）

单项选择题 An administrator has mirrored rootvg onto hdisk1,after the physical volumes finished syncing the administrator wants to add the newdisk to the boot order.Currently the boot order looks like:hdisk0 blv=hd5. Which of the following commands will add hdisk1 to the current boot order?（）