IBM C4090-456 Actual Free Exam Questions & Community Discussion

Exam Code/Number: C4090-456
Exam Name/Title: IBM XIV Storage System Technical Solutions V4
Certification Provider: IBM
Corresponding Certification: IBM Certified Specialist

Exam Questions: 70
Updated On: Jun 06, 2026

Question #15

On an XIV system, how can a thin provisioned volume be changed to a regular provisioned volume?

A. in the GUI, right mouse click on the volume and select"regular provision"

B. in the XCLI, use the command vol_resize on the volume

C. in the GUI, right mouse click on the volume and move itto a regular pool

D. in the XCLI, use the command pool_change_config on the pool containing the volume

Discussion 0

Correct Answer: C Vote an answer

Question #16

On XIV what factors are important to successfully implement asynchronous mirroring?

A. latency between the remote and local XIV, number of volumes must be less than 256

B. data change rate, number of volumes less than 256, required RPO

C. each mirror must have the same RPO and sync interval within the same storage pool

D. data change rate, available bandwidth and interval

Discussion 0

Correct Answer: D Vote an answer

Question #17

A customer complains that their SAP database now performs worse than it did before being migrated from traditional RAID storage to XIV. The database was configured using 20 x 200GB XIV LUNs presented to an AIX 6 host OS where they are concatenated and striped into six volumes for the databases and logs. No changes have been made in the transition to XIV.
What if anything can be done to improve performance?

A. implement static load balancing and increase the queue depth of the host adapters

B. the SAP volumes should be put into a QoS Performance Class

C. the databases should be reorganized into larger volumes on the XIV and not striped within the OS

D. add Fibre Channel adapters to the host and balance volumes across the adapters

Discussion 0

Correct Answer: C Vote an answer

Question #18

Where is the XIV VSS Provider software installed?

A. on servers or VMs connected to the XIV system

B. on the XIV maintenance module

C. as a plug-in to the XIV GUI

D. on the interface modules of the XIV system

Discussion 0

Correct Answer: A Vote an answer

Question #19

Compared to other IBM storage offerings, which of the following is unique functionality on an XIV system?

A. ability to take snapshots

B. reduced single points of failure

C. IP based replication

D. prevents hotspots

Discussion 0

Correct Answer: D Vote an answer

Question #20

What is the maximum period of time the XIV system stores detailed host and volume data?

A. 30days

B. 90days

C. 365days

D. forever

Discussion 0

Correct Answer: A Vote an answer

Question #21

A technical specialist is planning an XIV installation. Where can the worksheets needed for installation be found?

A. IBM XIV Storage System Planning Guide

B. IBM XIV Host Attach Redbook

C. IBM Fix Central

D. IBM XIV Gen3 Architecture, Implementation and Usage Guide

Discussion 0

Correct Answer: A Vote an answer

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