IBM Enterprise Storage Technical Support V3 : C4090-958

  • Exam Code: C4090-958
  • Exam Name: Enterprise Storage Technical Support V3
  • Updated: Aug 15, 2026
  • Q & A: 143 Questions and Answers

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IBM C4090-958 Exam Syllabus Topics:

SectionObjectives
IBM Enterprise Storage Solutions- IBM DS8000 / enterprise disk systems
  • 1. Architecture and components
    • 2. Replication technologies
      - IBM FlashSystem
      • 1. Performance optimization
        • 2. Flash storage architecture
          Storage Systems Architecture- Enterprise storage fundamentals
          • 1. Storage networking concepts (SAN, NAS)
            • 2. Block vs file vs object storage
              Performance, Monitoring, and Troubleshooting- Problem determination
              • 1. Log analysis and diagnostics
                - Storage performance tuning
                • 1. Latency and throughput analysis
                  Data Protection and Replication- Replication technologies
                  • 1. Metro Mirror / Global Mirror concepts
                    - Backup and recovery concepts
                    • 1. Snapshot and cloning techniques
                      • 2. Business continuity planning
                        Storage Area Network (SAN) Management- SAN connectivity and zoning
                        • 1. Zoning and LUN masking
                          • 2. Fibre Channel concepts
                            - Switch and fabric management
                            • 1. Brocade / Cisco SAN switches basics

                              IBM Enterprise Storage Technical Support V3 Sample Questions:

                              1. A customer wants to add a fully populated BladeCenter chassis to their existing core-edge SAN. They have suffered performance issues in the past due to congestion and over-utilization of inter-switch links (ISL). The customer has asked what is the best practice guideline concerning ISL oversubscription ratio.
                              Which one of the following ratios does the technical specialist provide?

                              A) 20:1
                              B) 10:1
                              C) 50:1
                              D) 1:1


                              2. Which IBM enterprise storage solution offers a tape based tier option when used with a Tivoli Storage Manager (TSM) server, called HSM (Hierarchical Storage Manager), and will allow the file system to be extended to TSM managed tape devices?

                              A) N7950T Gateway
                              B) Storwize V7000
                              C) SVC Easy Tier
                              D) SONAS


                              3. A customer is considering adding additional IBM storage to the environment. The customer is unaware of the current system usage or performance.
                              What is available from IBM that will allow the customer to track real time, historical data and exported reports to justify the purchase of the new IBM storage systems?

                              A) To stat or iometer
                              B) Windows PerfMon
                              C) Compile workload data from all devices in the environment
                              D) Install TPC to evaluate current systems to compare data against IBM subsystems


                              4. An XIV Gen3 was ordered with the wrong power option. What must be done to correct this situation?

                              A) The correct power configuration must be ordered and changed in the field.
                              B) The Systems Support Representative can change the power receptacle in the field
                              C) The IBM Certified Engineer can modify the automatic transfer switch
                              D) The system must be returned to the factory for repair


                              5. A customer has two redundant fabrics with four switches per fabric1 and each fabric has two VSAN5.
                              What is the minimum number of out-of-band connections required by Fabric Manager to discover and manage the fabrics?

                              A) 2
                              B) 8
                              C) 16
                              D) 4


                              Solutions:

                              Question # 1
                              Answer: B
                              Question # 2
                              Answer: A
                              Question # 3
                              Answer: B
                              Question # 4
                              Answer: D
                              Question # 5
                              Answer: B

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