单项选择题

On IBM System Stoage DS8000 which of the following information pairs are mandatory to create a volume（）

A.extent pool id and volume id
B.extent pool id and volume name
C.volume id and extent allocation method
D.volume name and extent allocation method

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单项选择题

A customer has bought an IBM System Storage DS8700 and wants to attach ten SuSE Linux Enterprise Server hosts to the DS8700 with multiple paths.
What is the Multipathing Driver the customer needs（）

A.PowerPath
B.Subsystem Device Driver Device Specific Module
C.Subsystem Device Driver Path Control Module
D.DeviceMapper Multipath

单项选择题

What is the correct order to create an object in a new IBM System Storage DS8000 to get a LUN provided to a host（）

A.rank， array， extent pool， volumes， volume group， host connections
B.rank， array， extent pool， volume group， volumes， host connections
C.array， rank， extent pool， volume group， volumes， host connections
D.array， extent pool， volumes， rank， volume group， host connections

单项选择题

A new Disaster Recovery site has been established using Metro Mirror to hold synchronous data at both sites. After the Metro Mirror is started， one of the most important applications， a DB2 database， slows down. An analysis shows that the I/O rate （especially write I/Os） is less than 40% compared to the former rates.
What is the best explanation for this behavior（）

A.the bandwidth of the PPRC connection between the two sites is too small
B.the DS8000 SFI at the remote site was shipped with slower disks
C.I/O rates vary， depending on the distance between the two sites and the rates cannot be changed easily， due to latency
D.the DB2 database does not work with Metro Mirror without an additional license