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Updated: Sep 03, 2026
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IBM C4090-456 Exam Overview:
| Certification Vendor: | IBM |
|---|---|
| Exam Name: | IBM XIV Storage System Technical Solutions V4 |
| Exam Number: | C4090-456 |
| Exam Format: | Multiple Choice |
| Certificate Validity Period: | 3 years |
| Available Languages: | English |
| Exam Duration: | 105 minutes |
| Passing Score: | 65% |
| Related Certifications: | IBM Certified Storage Specialist |
| Exam Price: | USD 200-300 |
| Real Exam Qty: | 69-70 |
| Recommended Training: | IBM XIV Knowledge Center IBM XIV Storage System Technical Solutions Redbooks |
| Exam Registration: | IBM Certification Site Pearson VUE Registration |
| Sample Questions: | IBM C4090-456 Sample Questions |
| Exam Way: | Proctored onsite test at Pearson VUE / Prometric centers |
| Pre Condition: | Basic knowledge of storage systems, SAN, and IBM storage portfolio; no mandatory prerequisites |
| Official Syllabus URL: | https://www.ibm.com/certify/exams/c4090456 |
IBM C4090-456 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Interoperability & Migration | 10% | - Data migration methods - Host connectivity - Virtualization integration |
| XIV Software & Features | 30% | - Thin provisioning - GUI and CLI management - Remote mirroring (sync/async) - Snapshots and consistency groups |
| XIV Hardware Architecture | 25% | - Reliability and serviceability - System components and modules - Gen1 / Gen2 / Gen3 differences |
| XIV Storage System Overview | 20% | - Competitive advantages - Architecture and business value |
| Capacity & Performance Design | 15% | - Capacity on Demand - Performance optimization - Workload sizing and best practices |
IBM XIV Storage System Technical Solutions V4 Sample Questions:
Question 1
What is a benefit of the XIV system's grid-based architecture?
A. SSDs must be installed in the interface modules only
B. differentcapacitydrives can be mixed within the system but not in the same module
C. each module contains processing, caching and storage
D. any module can act as an interface module
Question 2
What is the fastest way to see which volume is receiving the most IOPS on the XIV?
A. open XIV GUI and select the first 12 volumes, and then next 12 and so on
B. opentheXIV GUI and checkthe volume view
C. run XCLI command xcii volume_max_iops_list
D. openXIVTopinthedefaultview
Question 3
XIV hardware architecture optimizes the usage of snapshots by:
A. a redirect-on-write operation using all drives in any snapshot process
B. limiting the total number of snapshots to a maximum of 128 active pairs
C. copying data on write so the production drives are not over stressed
D. offering the possibility to isolate the drives used for snapshot target space
Question 4
Which activity occurs after upgrading an XIV system from nine modules to ten modules?
A. the SAN fabric is re-zoned to include another two host ports
B. the default extent size is increased by 11.1% or 512K, whichever is smaller
C. pools are reconfigured to include an additional twelve disks, less the hot spares
D. the system redistributes all data across all drives
Question 5
Which statement is true regarding XIV connectivity to IBM PowerVM VIOS clients?
A. NPIV must be used.
B. AIX, Linux and IBM i VIOS clients are supported.
C. NPIV is not supported.
D. Direct iSCSI connection to VIOS is supported.
Solutions:
| Question 1 Answer: C | Question 2 Answer: D | Question 3 Answer: A | Question 4 Answer: D | Question 5 Answer: B |
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