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Hitachi Vantara Certified Expert - Performance architect Questions and Answers

Question 1

A 10K RPM Small Form Factor 600 GB disk drive has a 3 ms average rotational latency and a 4 ms average

seek time. How many random read IOPS would you expect from a 4D+4D RAID group using these drives

before any consideration for cache hits or queuing optimization benefits?

Options:

A.

approximately 570 IOPS

B.

approximately 1,140 IOPS

C.

approximately 1,530 IOPS

D.

approximately 2,280 IOPS

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Question 2

Which three key metrics are required for sizing applications? (Choose three.)

Options:

A.

cache read hit ratios

B.

IOPS

C.

I/O read/write ratios

D.

number of BED pairs

E.

port speed

Question 3

Which two statements are true about the Active Flash feature on the VSP Midrange? (Choose two.)

Options:

A.

The Active Flash feature of Hitachi Dynamic Tiering monitors page access frequency in real-time, and

immediately promotes pages that suddenly become busy.

B.

The Active Flash feature can be enabled on any HDT pool as long as Tier 1 of the Dynamic Tiering pool is composed of SSD or FMD drives.

C.

The Active Flash feature can be enabled on any HDP pool as long as the pool is comprised of SSD or

FMD drives.

D.

The Active Flash feature of Hitachi Dynamic Tiering monitors page access frequency in real-time, and

promotes pages based on a predefined schedule.