DES-1D12 Free Practice Test

For Dell EMC SC Series arrays, what is the minimum percentage of total system IOPS that should be applied to Tier 3 drives?

1. A. 15%
2. B. 20%
3. C. 25%
4. D. 100%

Correct Answer: B
"As a standard, tier 3 drives should encompass a minimum of 20% system IOPS potential."

A Dell EMC Unity storage administrator has 10 hosts. One of the hosts experiences occasional, huge IO bursts.
What is a best practice for avoiding performance issues during these burst periods?

1. A. Enabling Quality of Service (QoS) will limit the burst problem
2. B. Quality of Service (QoS) is enabled by default, so one only needs to configure burst settings
3. C. Enable Quality of Service (QoS) then limit I/O for the entire FC port
4. D. Enable Quality of Service (QoS) then configure burst settings

Correct Answer: D

What are the two biggest factors that determine IOPS when using SSDs in a Dell EMC SC Series array?

1. A. Current latency and queue depth
2. B. Application block size and overall throughput
3. C. Multi-tenant arrays and tier configuration
4. D. Read/write percentage and peak workload

Correct Answer: B
The reason there is such a large range in the number of IOPS delivered by SSDs is the IOPS are truly dependent on the type of traffic the SC Series was designed to handle. The two biggest factors that will determine IOPS in an SSD environment are block size of the application and overall throughput.

Which Dell EMC Midrange storage platforms support NVMe SCM drives?

1. A. PowerStore T and SC Series only
2. B. PowerStore T and PowerStore X
3. C. PowerStore T, Unity XT, and SC Series
4. D. PowerStore X, Unity XT, and SC Series

Correct Answer: B

A customer has a Dell EMC SC9000 array with six SC420 enclosures running SCOS 7.3. The enclosure configuration is as follows:
Two enclosures have write-intensive SSDs
Four enclosures have read-intensive SSDs
What is recommended as a general guideline for making spare drive assignments?

1. A. 2 spare drives per shell
2. B. Dedicated spares are not required
3. C. 2 spares per drive type per array
4. D. 1 spare per drive type per shell

Correct Answer: B
"SCOS 7.3, Distributed Sparing: eliminates the need for dedicated spares by giving customers the option to distribute sparing capacity across all drives in the array."