IBM System Storage DS8000 Technical Solutions V3 : C4090-453

C4090-453 real exams

Exam Code: C4090-453

Exam Name: IBM System Storage DS8000 Technical Solutions V3

Updated: Sep 05, 2025

Q & A: 70 Questions and Answers

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IBM System Storage DS8000 Technical Solutions V3 Sample Questions:

1. A potential D6881J0 customer asks the technical specialist if the D38800 systems provide a point in time copy solution where the FlashCopy volume can logically be pre-configured but no disk space is allocated as long as there are no updated tracks written.
Which D38800 FlashCopy method supports this customer's requirement?

A) space efficient FlashCopy
B) dataset FlashCopy
C) FlashCopy with N000PY option
D) incrementalFlashCopy


2. Which of the following statements regarding the DSS000 Metro Mirror consistency group function is true?

A) A Metro Mirror consistency group must be contained within a single primary disk subsystem.
B) The consistency group functionality requires external automation such as Tivoli Storage Productivity Center V5.x or GDPS to work correctly.
C) Simply enabling the Metro Mirror consistency group function on a PPRC path will provide consistency for all devices in this LSS.
D) Metro Mirror consistency groups are not required to maintain data consistency across devices in a disaster situation.


3. 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) 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.
C) 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.
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.


4. The output of what tool is used as input to Disk Magic to most accurately model a Windows host that will be used with an IBM D38000?

A) Jetstress
B) IOSTAT
C) Perimon
D) NMON


5. Which statement is true of the Easy Tier feature on DS8000?

A) It handles data in 256 MB chunks.
B) It will operate in a homogeneous pool.
C) It requires SSDs to be added to a heterogeneous pool to operate.
D) It is a priced feature by terabytes used.


Solutions:

Question # 1
Answer: A
Question # 2
Answer: B
Question # 3
Answer: D
Question # 4
Answer: C
Question # 5
Answer: B

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