Users are complaining of slow performance. The iostat command indicates hdiskxxx is extremely busy. There is no activity on any other hdisks in the same volume group. Which of the following is the best action to take?（）

A.All new disks in the system will be formatted
B.Only the contents of the root volume group destination disks will be destroyed
C.All file systems, including /(root), /tmp, /usr, and /var, but no usr data in the root volume group, will be destroyed
D.The contents of all disks on the system, even if they are not shown as the destination root volume group disks, will be destroyed

A.A logical volume must exist prior to running the crfs command to create a file system
B.A file system must be unmounted before it can be removed
C.Defining a file system imposes a structure on a logical volume
D.Removing a file system using rmfs automatically removes the underling logical volume

A.All filesets for CDE have not been loaded. Boot into maintenance mode and load them through SMIT.
B.There is a missing device driver, incorrect console configuration, or a serial device plugged into native S1 port.
C.The new graphics adapter card is marked defined, not available. Rum smit cfgmgr (Install/Configure Devices Added After IPL with the INPUT device /directory for software set to none). This will reconfigure all devices by walking the bus.
D.The LED C31 means that there is a corrupted /dev/hd5. Boot into maintenance mode, fsck /dev/hd5 and then issue the bosboot command.