[单选]
A global customer’s IT strategy is based upon two DS8000 systems and an N series gateway. They want to protect their
business by implementing a disaster recovery solution. The storage specialist has recommended cascaded mirroring.
Which of the following is the business benefit of cascaded replication（）

A . it is cost efficient， as a single N series or DS8000 can have its controllers split between the primary and secondary site and use semi- synchronousmirroring while using asynchronous mirroring to a third site
B . the second site acts as a repeater station so that greater geographical distances can be achieved
C . ITprovides high availability together with disaster recovery by implementing Metro/Global Mirror across three geographically dispersed systems
D . it guarantees data protection by implementing two synchronous copies of the primary site data

An administrator is supporting an AIX 6.1 LPAR remotely and needs a tape operator to plug a cable into an Ethernet adapter. The tape operator does not have POWER6 595 knowledge. What can the administrator do to assist the tape operator to locate the correct adapter?（） Advise the tape operator to review the hardware service guide.。 Use the diag command to set the Ethernet adapter slot LED to flash.。 Advise the tape operator to check the WWN stickers of all Ethernet adapter in the I/O drawers.。 Create a login account for tape operator on the HMC and advise the tape operator to locate the adapter using the GUI step by step.。工程施工阶段，不是承包人应做好的工程结算管理工作是（）。 A.做好进场前施工准备工作，为竣工结算留下伏笔。 B.施工过程中做好签证和变更工作。 C.做好索赔工作。 D.做好跟业主和监理的沟通工作。 A HACMP/XD：HAGeo cluster has been installed with four nodes， two nodes at each site. The cluster is protected from site isolation by the DBFS facility in HACMP/XD：HAGeo. In the event of a site failure，what happens？（） The dominate site will always assume the non-dominate site has failed and continue processing.。 The dominate site initiates a call to the non-dominate site to verify if any of the nodes are functional.。 The non-dominate site initiates a call to the dominate site to verify if any of the nodes are functional.。 The nodes are completely independent and can call each other if they detect a total failure of the ZGeo_Primary network.。中餐厨房通常都有哪些岗位？其岗位职责是什么？简述贺德克水冷系统的加水是的排气过程.

A global customer’s IT strategy is based upon two DS8000 systems and an N series gateway. They want to protect their
business by implementing a disaster recovery solution. The storage specialist has recommended cascaded mirroring.
Which of the following is the business benefit of cascaded replication（）

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