Exam Name: IBM System Storage DS8000 Technical Solutions V3
Certification Provider: IBM
Corresponding Certification: IBM Certified Specialist
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IBM C4090-453 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Copy Services | - FlashCopy functions - Metro Mirror (PPRC synchronous replication) - Global Mirror (asynchronous replication) |
| Topic 2: Installation and Configuration | - Host attachment and connectivity configuration - Initial system setup and planning |
| Topic 3: Storage Management and Operations | - Performance monitoring and optimization - Volume management and provisioning |
| Topic 4: DS8000 Architecture and Concepts | - Hardware components and virtualization concepts - System architecture overview |
| Topic 5: Troubleshooting and Maintenance | - Problem determination and diagnostics - System maintenance procedures |
IBM System Storage DS8000 Technical Solutions V3 Sample Questions:
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.
Correct Answer: C 🗳️
A customer has an existing D68800 which is installed in their data center. It now must have an extra frame added to support additional capacity growth, but there is no room to fit the expansion frame to the right.
Which option should be taken?
- A. Disruptively relocate the D68800 to make space to the right of the base frame for the expansion frame
- B. Create an MES to replace all of the existing capacity with larger drives which support both the existing workload and the planned increase
- C. Configure the expansion frame with the DS8000 Passthrough feature to allow placement of the frame anywhere
- D. Fit the expansion frame to the left of the base frame
Correct Answer: A 🗳️
The customer's data center has an elevator with a maximum load capacity' of 2200 lb (1000 kg). A Disk Magic study has proved that the performance requirements of the workload are at Enterprise class levels.
What should be recommended?
- A. Configure the feature code on DS8800 which allows a shipping weight reduction.
- B. Redesign the solution to use modular systems, like IBM Storwize V7000, which could be delivered in lighter shipments.
- C. A standard D68800. The Customer Engineer can then remove parts until the elevator load capacity' is not exceeded.
- D. Order a DS8800 with minimal disks and then MES upgrade with additional capacity' to the customer's requirements.
Correct Answer: A 🗳️
Which tool can a customer use without assistance to determine whether a mixture of different disk types, in conjunction with Easy Tier, could improve performance on a DS8000?
- A. Storage Tier Advisor
- B. Pre-Sales Advisor
- C. Capacity Magic
- D. Disk Magic
Correct Answer: A 🗳️
A customer wants to place some HDDs in a DS8870. The customer also wants to enable Easy Tier with SSD for all HDDs, but wants to minimize the amount of SSDs purchased.
Which option would be valid?
- A. SSDs come in half drive sets (8 drives). Purchasing a single half drive set, if configured properly, would enable all the HDDs to be in an Easy Tier pool at the lowest cost.
- B. IBM recommends a 2:1 ratio of HDDs to SSDs, so the customer should purchase half the number of SSDs compared to the number of HDDs purchased.
- C. IBM never recommends less than 50% of the configured drives be SSD, so the customer should match the number of HDDs with the same number of SSDs.
- D. SDDs come in full drive sets (16 drives). Purchasing a single full drive set, if configured properly, would enable all the HDDs to be in an Easy Tier pool at the lowest cost.
Correct Answer: D 🗳️
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