单项选择题 A System p administrator has an application that has the data in volume group appvg.  Which of the following commands will back up the contents of appvg to the tape in /dev/rmt0 and check for any read errors （）

单项选择题 Whichofthefollowingcommandswouldasystemadministratorusetoautomatemonitoringandnotificationoffillingfilesystems（）

单项选择题 A System p administrator is currently working on a problem with IBM Support. The administrator feels that their expectations are not being met on this problem.  What is the IBM recommended procedure to ensure that the request is handled appropriately （）