单项选择题
A.Dual I/O planar， dual disk drives， dual SCSI adapters
B.Dual disk drive enclosures， dual disk drives， extra media bay
C.Dual disk drive enclosures， dual disk drives and dual SCSI adapters
D.Dual I/O planar， extra media bay， dual disk drives
单项选择题 Following a system boot，the display indicates that previously detected hardware is missing. Which of the following commands would identify the missing hardware？（）
单项选择题 An administrator has a two-disk volume group （testvg） with one logical volume （testlv） which has just been mirrored across both disk drives. Which of the following commands can be used to turn off quorum？（）
单项选择题 An administrator has received complaints from users that an application is not available while other applications run. This application resides on an NFS mounted filesystem. Which of the following commands should be run as a reasonable first step to handle this problem？（）