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Exam Code: C4090-453
Exam Name: IBM System Storage DS8000 Technical Solutions V3
Certification Provider: IBM
Corresponding Certification: IBM Certified Specialist
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 |
|---|---|
| Solution Design and Sizing | - Customer requirement analysis - Sizing tools and capacity planning (e.g., Disk Magic, Capacity Magic) |
| DS8000 Architecture and Features | - System components and architecture - Storage management and performance features |
| Pre-Sales and Customer Engagement | - Positioning and competitive differentiation - Technical and Delivery Assessment (TDA) |
| Implementation and Configuration | - Host attachment and interoperability - Advanced functions configuration (FlashCopy, Global Mirror, etc.) |
IBM System Storage DS8000 Technical Solutions V3 Sample Questions:
A customer has submitted an REP for which a DS8870 is the preferred solution to support their VMware environment. They require support for VAAI Extended Copy.
What should the technical specialist advise this customer?
- A. A DS8870 with FlashCopy should be proposed
- B. DS8870 supports the VAAI functionality required by this customer
- C. A SAN Volume Controller must be proposed along with the DS8870 to provide VAAI support
- D. VAAI is only a host function so any disk subsystem can be considered
Correct Answer: B 🗳️
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. 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.
- B. 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.
- C. 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.
- D. 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.
Correct Answer: B 🗳️
When I/O Priority Manager is enabled, each volume in a D38800 is assigned to a performance group at the time of the volume creation.
What action will the DS8800 take to ensure that the most important volumes as defined to I/O Priority Manager receive the highest level of system resources available?
- A. allocate additional cache for volumes with higher performance policies
- B. invoke Easy Tier for higher performance policy I/Os
- C. delay I/Os with lower performance policies
- D. move volumes with higher performance policy I/Os to faster disks or SSDS
Correct Answer: C 🗳️
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 business class cabling and the largest available capacity SAS drives
- C. Offer a DS8870 with standard cabling and the largest available capacity SAS drives
- D. Offer a DS8870 with the largest available capacity SATA drives
Correct Answer: B 🗳️
In a DSSSOO controller which components are created during configuration of space-efficient (PTC-SE) storage in an extent pool?
- A. Volume and virtual space
- B. Source volume and target volume
- C. Background copy and target copy
- D. Virtual space and repository space
Correct Answer: D 🗳️
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