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IBM C4090-453 Exam Syllabus Topics:

IBM System Storage DS8000 Technical Solutions V3 Sample Questions:

Question 1

A customer has a mission-critical application with redundant fabrics. The customer plans to replace older EMC system with a DS8870 and a SAN Volume Controller (SVC).
Which statement best describes the impact of data migration on the production environment?

A. The production environment requires an outage to remove the EMC systems.
B. The production environment requires an outage to install the SVC.
C. The production environment requires an outage to install the D58870.
D. The production environment does not require an outage.

Question 2

A potential DS8870 customer knows that RAID 5 works much faster and is more capacity-efficient than RAID 6, but they fear for double disk failures due to high rebuild times at large disk sizes.
How should the technical specialist address this concern?

A. Explain RAID 6 is the only applicable solution.
B. Discuss how additional hot spares can be configured per device adapter pair.
C. Discuss the DSS000 Smart Rebuild function with the customer.
D. Suggest configuring large storage pools with multiple RAID 5 arrays.

Question 3

A mainframe customer would like to receive a proposal for a mainframe storage system with 120 TB raw capacity. The mainframe server load is not too high, and they need drives with the lowest possible power consumption to keep operating costs low. The customer will not increase the capacity of their mainframe applications in the future but rather invest later into their Power servers.
Which of the following solutions best meets these requirements at the lowest cost?

A. Offer a DS8870 with the largest available capacity EC drives
B. Offer a DS8870 with standard cabling and the largest available capacity SAS drives
C. Offer a DS8870 with business class cabling and the largest available capacity SAS drives
D. Offer a DS8870 with the largest available capacity SATA drives

Question 4

Which of the following items would suggest that the use of space efficient FlashCopy for the Global Mirror secondary volume could present an issue?

A. There are multiple primary disk subsystems in the Global Mirror session
B. The workload has a large amount of heavy sequential write activity
C. The customer is using Tivoli Storage Productivity Center for Replication to manage Global Mirror
D. There is a long distance between the primary and secondary sites

Question 5

After initial installation of DSSSOO systems in a customer site a review must be conducted to verify that the disk system performance is in range.
How can the cache hit ratio be verified?

A. Use Tivoli Storage Productively Center
B. Use the pen stat command in the CLI
C. Use the DSS000 Real Time Performance Monitor
D. Issue the CLI command dscli>verify-perf-read hit-time period

Solutions: