IBM : C4090-457 Questions & Answers
Last Updated: Aug 29, 2026
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IBM C4090-457 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Copy Services | 14% | - Metro Mirror and Global Mirror - Consistency groups - FlashCopy snapshots and clones |
| Host Attach | 13% | - Multipath setup and best practices - Fibre Channel and iSCSI connectivity - Host configuration and volume mapping |
| Hardware Initial Configuration and Installation | 21% | - System components and racking - Software installation and licensing - Initial setup and network configuration |
| Data Migration and External Virtualization | 12% | - Data migration methods - Virtualization layer configuration - Importing external storage |
| Additional Disk Configuration | 8% | - RAID levels and allocation - Managed disks and storage pools - Expansion enclosure integration |
| Real-time Compression | 6% | - Performance considerations - Compression licensing - Volume compression configuration |
| Easy Tier | 6% | - Performance optimization - Configuration and monitoring - Tiered storage concepts |
| Troubleshooting | 10% | - System logs and alerts - Performance monitoring - Fault isolation and resolution |
| User Management | 5% | - Role-based access control - Security policies - User accounts and permissions |
| Clustering | 5% | - Quorum and redundancy - Cluster creation and management - I/O group configuration |
IBM Storwize V7000 Implementation V1 Sample Questions:
Question 1
What will reduce the real capacity of a compressed volume to a specified amount?
A. Use CLI command shrinkvdisksize -size
B. Management GUI under Volumes > Volumes list
C. Use CLI command shrinkvdisksize -rsize
D. Management GUI under Monitoring tab System Details
Question 2
What does the multipathing driver on the host accomplish?
A. Creates a logical volume to the LUN
B. Corrects any network error
C. Consolidates the instances of the same LUN
D. Increases the number of ports the LUN reports to
Question 3
During Storwize V7000 implementation an implementer finds that with a recovery point objective of 30 minutes Global Mirror is consuming more bandwidth than was originally designed.
How can the Storwize V7000 be reconfigured to reduce Global Mirror bandwidth consumption while maintaining the recovery point objective?
A. Convert to Metro Mirror relationships
B. Activate Real-time Compression
C. Utilize FlashCopy with the "Backup" preset
D. Convert to Global Mirror with Change Volume relationships
Question 4
When directly connecting an IBM Power System running IBM i to a Storwize V7000 what is the required IBM i operating system version?
A. 5.4
B. 6.1
C. 7.1
D. 6.4
Question 5
When provisioning storage from an external array to Storwize V7000 which of the following
is the best practice?
A. Virtualize storage system where LUNs are configured using RAID 0
B. Mix LUNs that vary in performance or reliability in the same storage pool
C. A single LUN from an external storage array can be shared with multiple Storwize V7000 system
D. Make sure to configure LUN settings to map all LUNs to all WWPNs m the Storwize V7000
Solutions:
| Question 1 Answer: A | Question 2 Answer: C | Question 3 Answer: A | Question 4 Answer: C | Question 5 Answer: D |
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