单项选择题 During an internal IT organization planning session， it is decided that a new cluster node would  Enhance the performance of a distributed corporate application. Planning details have been assigned to the administrator. System outages are limited to one weekend per month； therefore， availability will be a key issue in the planning process.  How much cluster downtime will need to be allocated for adding a new node？（）

单项选择题 AfteranunsuccessfulsynchronizationorDAREupdate，whichcopyoftheHACMPODMremainsTopreventfurtherchangesfrombeingmade？（）

单项选择题 Aclusternodehasafailedfibreadapterrequiringthenodetobehaltedtoreplaceit.Tominimizedowntime，whatistheappropriatemethodofperformingthisrepair？（）