A customer has an IBM System Storage DS8100 and wants to reach the highest possible throughput in the back-end for a storage-pool-striped volume out of an extent pool with 8 ranks. 
Over how many device adapter pairs should a technical specialist spread the workload（）

A customer wants to consolidate storage from four IBM System p servers and one large IBM System i server. The customer does not have a SAN installed. The customer will require approximately 4 TB for System p and 3 TB for System i. The customer states that performance and isolation of the System i system is most important. Capacity， multi-path access， and replication functions are important for the System p servers.   
Which solution best satisfies the customer requirements（）

A bank has requested proposals for a storage solution to upgrade their disaster recovery processes for their IBM System z， UNIX， and Microsoft Windows environment. The solution must simulate a multi-site environment and provide the customer the ability to evaluate Metro Mirror， Global Mirror， Global Mirror for z/OS， and FlashCopy. Floor space is limited. 
Which solution best meets the specified requirements（）

A customer has requested an IBM System Storage DS8300 solution to meet the following requirements：  - 20% yearly growth - 29，000 IOPS - approximately 50/50 mix of read/write operations - small （4 KB） data transfers  The storage specialist has created a Disk Magic model in which each port is capable of approximately 2，900 to 3，100 IOPS. 
What is the minimum number of ports that should be configured on the DS8300 to handle the projected workload for the first year（）