单项选择题
A. Two independent copies of the data can be created and synchronized using the "HACMP/XD：HAGeo"
B. The existing disks can be incorporated a single storage unit using the optional product "HACMP/XD：PPRC"
C. AIX can create a mirrored logical volume across the two systems that would be accessible from either system
D. AIX can use the multi path IO subsystem to spread the information across the devices and keep the copies separated
单项选择题 An administrator mistakenly shutdown production after a fallover because the service IP address Was shifted from the normal production node to the standby node. What can be done to avoid this type of mistake in the future？（）
单项选择题 Onanexistingtwo-nodecluster，thesystemisconfiguredwithRAID5SSAastheshareddisk.Whenaddinganewnodetothecluster，whatmustbetakenintoconsideration？（）
单项选择题 While an electrician was adding additional circuits for the Data Center， the system running the Database inadvertently powered down. The fallover of the service IP labels and volume groups to the hot standby node completed as expected； however， the database did not start. The database log file indicated that the database was already started. What is the most likely cause of this problem？（）