IBM C4090-456 : IBM XIV Storage System Technical Solutions V4

C4090-456 real exams

Exam Code: C4090-456

Exam Name: IBM XIV Storage System Technical Solutions V4

Updated: Sep 08, 2026

Q & A: 70 Questions and Answers

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IBM C4090-456 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: XIV Storage System Overview20%- Competitive advantages
- Architecture and business value
Topic 2: Capacity & Performance Design15%- Workload sizing and best practices
- Performance optimization
- Capacity on Demand
Topic 3: XIV Software & Features30%- Remote mirroring (sync/async)
- Snapshots and consistency groups
- GUI and CLI management
- Thin provisioning
Topic 4: Interoperability & Migration10%- Virtualization integration
- Data migration methods
- Host connectivity
Topic 5: XIV Hardware Architecture25%- System components and modules
- Reliability and serviceability
- Gen1 / Gen2 / Gen3 differences

IBM XIV Storage System Technical Solutions V4 Sample Questions:

Question #1

What is a benefit to IBM's XIV SSD transparent read cache?

  • A. SSD read cache is a separate tier
  • B. real-time cache algorithm; not policy-based
  • C. performance improvement in sequential reads
  • D. SSD drives add usablecapacitywithout user intervention
Answer: B
Question #2

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

  • A. IP based replication
  • B. ability to take snapshots
  • C. reduced single points of failure
  • D. prevents hotspots
Answer: D
Question #3

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

  • A. data change rate, number of volumes less than 256, required RPO
  • B. latency between the remote and local XIV, number of volumes must be less than 256
  • C. data change rate, available bandwidth and interval
  • D. each mirror must have the same RPO and sync interval within the same storage pool
Answer: C
Question #4

Which of the following is a benefit of the XIV system's hardware architecture?

  • A. SAS bus interface allows the use of industry standard Enhanced IDE drives
  • B. data distributed across all hard drives improves system throughput
  • C. InfiniBand connectivity between XIV systems for extended distance mirroring
  • D. mirrored interface modules provide increased data throughput
Answer: B
Question #5

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

  • A. connect interlace modules using a crossover cable
  • B. use the XIV system's SCSI ports
  • C. route InfiniBand across Ethernet
  • D. route Fibre Channel across IP
Answer: B

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