IBM C4090-453 : IBM System Storage DS8000 Technical Solutions V3

Exam Code: C4090-453

Exam Name: IBM System Storage DS8000 Technical Solutions V3

Updated: Jun 05, 2026

Q & A: 70 Questions and Answers

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IBM System Storage DS8000 Technical Solutions V3 Sample Questions:

1. Which of the following is true regarding Extent Pools on a D38000?

A) A Fixed Block LUN can have extents from separate ranks within the same Extent Pool.
B) A Fixed Block LUN can span multiple Extent Pools.
C) A Count Key Data Volume can span multiple Extent Pools.
D) A Count Key Data Volume cannot have extents from separate ranks within the same Extent Pool.


2. Which of the following statements about remote replication on the D38000 is true?

A) Metro Mirror's longest supported distance is 100 kilometers
B) Global Mirror has a maximum of 256 volumes
C) Global Copy does not provide consistency
D) Metro/Global Mirror can only be used for z/OS data


3. As with all types of technology. System z software occasionally needs to have maintenance applied to it to fix errors or to support enhanced functionally.
In the System z environment, this maintenance is known as:

A) MLs and Patches
B) Service Level sets
C) Non-disruptive Code Loads
D) APAR5 and PTE5


4. A customer already has a D38000 with RAID 10 protection for their production data. They want to implement NL-SAS drives in the same DS8000 for archive data.
Which disk protection should be used for this and why?

A) RAID 10 because this is the only protection supported for NL-SAS drives
B) RAID 5 because data on these drives is less critical than the production data
C) RAID 0 because archive data isn't mission critical and they should use tape backup
D) RAID 6 because the time to rebuild NL-SAS drives would leave the array exposed for a long time after a single disk failure


5. A customer has recently decommissioned their DS8700 wants to use the same data center floor space for a new D38 870.
What is an important fact for the technical specialist to discuss with the customer as it relates to data center requirements?

A) The rack dimensions on the DS8870 are larger than the D38700 so more floor space will be needed.
B) The DS8870 uses a different power connector than the D68700 so new cords will need to be supplied.
C) Air circulation in the DS8870 has changed and flows back to front so cooling vent locations will need to be adjusted.
D) The DS8870 uses more power than the DS8700 so more power cords will need to be ordered.


Solutions:

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

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