IBM XIV Storage System Technical Solutions V4 (C4090-456) Free Practice Test

Question 1

When does XIV Gen3 SSD caching significantly improve performance?

A. for small block, sequential write I/O workloads

B. for GPES random workloads

C. for small block, random read I/O workloads

D. for large block, sequential read I/O workloads

Correct Answer: C

Question 2

A TELCO customer has an application that generates intensive small block random reads. The customer installed one XIV Gen3 system and is dissatisfied with this choice. They have enough performance on writes and sufficient capacity.
In order to consolidate more applications what should the technical specialist advise?

A. order an extra frame with SAS 15k drives

B. use external storage with FC drives and virtualize it under XIV

C. request IBM to change the nearline SAS drives with SAS 10k drives

D. orderthe SSD option and use itin conjunction with Q0S

Correct Answer: D

Question 3

XIV Quality of Service limits I/O to which of the following?

A. storage pools

B. mirrored pairs

C. consistency groups

D. hosts

Correct Answer: D

Question 4

On a thin-provisioned pool the size of the volume is limited by:

A. the soft capacity of the storage pool

B. the hardcapacityof the XIV

C. the hard capacity of the storage pool

D. the hard capacity of the volume

Correct Answer: A

Question 5

An XIV administrator wants to migrate a legacy DS4700 to XIV. The DS4700 is mirrored across a low-bandwidth link to a second DS4700 at a second site. The XIV volumes will need to be mirrored to a second XIV using asynchronous replication.
What feature will help perform this task?

A. offline initialization

B. asynchronous migration

C. volume mirroring

D. cache-disabled volumes

Correct Answer: A

Question 6

A customer wishes to mirror volumes between two XIV systems across Ethernet. What is the simplest way to achieve this?

A. use the XIV system's SCSI ports

B. route Fibre Channel across IP

C. connect interlace modules using a crossover cable

D. route InfiniBand across Ethernet

Correct Answer: A

Question 7

On an XIV system, what is the minimum hardware configuration when the Capacityl on Demand feature is used?

A. 15 modules

B. 9 modules

C. 6 modules

D. 12 modules

Correct Answer: C

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IBM XIV Storage System Technical Solutions V4 (C4090-456) Free Practice Test