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EMC D-MSS-DS-23 Exam Syllabus Topics:
Topic
Details
Topic 1
- Dell Midrange Sizing Solutions: This section of the exam measures the skills of storage engineers and covers the use of tools like the Midrange Sizer for Unity to size solutions effectively. It includes design methods and deliverables associated with sizing storage solutions.
Topic 2
- Dell Midrange Storage Solutions Planning, Sizing, and Design: This section of the exam measures the skills of storage engineers and covers the planning, sizing, and design phases of a Midrange solution sales engagement. It emphasizes conducting site evaluations and remediation processes while considering performance parameters and environmental limits. A critical skill evaluated is accurately characterizing workloads to inform design decisions.
Topic 3
- Midrange Storage Solutions Best Practice: This section of the exam measures the skills of Dell Unity and PowerStore Midrange Storage Solutions professionals and covers best practice recommendations for system configuration and upgrades. It includes guidelines on hardware capacity, deployment models, clustering, and operating system upgrades. A key skill assessed is implementing effective backend connectivity solutions that enhance system performance.
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EMC Dell Midrange Storage Solutions Design 2023 Sample Questions (Q33-Q38):
NEW QUESTION # 33
Which drive type can be used in a FAST Cache pool configuration for Dell Unity XT solutions?
- A. SAS Flash 3
- B. SAS Flash 4
- C. SAS Flash 2
Answer: C
Explanation:
SAS Flash 2 drives can be used in a FAST Cache pool configuration for Dell Unity XT solutions. FAST Cache (Fully Automated Storage Tiering Cache) allows frequently accessed data to be moved to high-performance SSDs, improving overall system performance. SAS Flash 2 drives are suitable for this purpose, providing a balance of performance, endurance, and cost. Reference:Dell Unity XT FAST Cache Overview
NEW QUESTION # 34
A systems administrator has deployed a Dell Unity XT 380F system with 15x 1.92 TB SSD drives, in a RAID
5 dynamic pool. Shortly after deployment, the administrator wants to expand the capacity of the system and use larger drives to increase the density. What will happen if the administrator adds 4x 3.84 TB SSD drives?
- A. The full capacity of the drives will be available.
- B. The mixing of drive types is not supported, and the operation will fail.
- C. Three of the drives will be added with a fourth reserved as spare.
- D. Only half of the capacity of the new drives will be available.
Answer: D
Explanation:
InDell Unity XT dynamic pools, when new drives are added to an existing pool, the system automatically integrates these drives into the pool. However,Unity XT dynamic pools only use the capacity of new drives up to the size of the smallest drive in the pool(a concept known ascapacity equalization).
#What happens here?
The original pool was created with1.92 TB SSD drives.
The administrator adds4 x 3.84 TB SSD drivesto the same pool.
Because the pool's smallest drive is1.92 TB, the system uses only1.92 TBof capacity from each of the new drives.
The remaining1.92 TBof the new drives' capacity isnot utilizedin the dynamic pool.
#Key Takeaways:
This behavior ensures uniform capacity usage across all drives in the pool, maintainingRAID group balance and data distribution.
To fully leverage the 3.84 TB capacity, the administrator would need to create anew poolusing only the larger drives.
#Documentation Reference:
Dell EMC Unity XT Best Practices Guide (Dell Technologies)- Discusses dynamic pool behavior and drive capacity equalization.
Dell EMC Unity XT Dynamic Pools Technical White Paper- Provides detailed explanations on how dynamic pools manage mixed drive sizes.
NEW QUESTION # 35
What is the minimum number of drives in a RAID 5 dynamic pool?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
The minimum number of drives in a RAID 5 dynamic pool is 5. RAID 5 requires at least 3 drives for data striping with parity, but Dell's implementation in Unity systems requires a minimum of 5 drives to ensure optimal performance and reliability.
Reference:
Dell EMC Unity RAID Configuration Guide.
Dell EMC Unity Best Practices Guide.
NEW QUESTION # 36
Which two workload parameters are required to proceed with sizing for a PowerStore solution?
(Select 2)
- A. Response time
- B. Data reduction ratio
- C. Effective Capacity
- D. IOPS
Answer: C,D
Explanation:
Sizing for PowerStore Solutions:
Accurate sizing for PowerStore solutions requires specific workload parameters to ensure that the storage system meets performance and capacity requirements.
Required Parameters:
IOPS (Input/Output Operations Per Second): A key performance metric indicating the number of read/write operations the system must handle. Essential for determining the required performance capability.
Effective Capacity: The usable storage capacity after considering data reduction technologies like compression and deduplication. Critical for ensuring the system can accommodate the data volume.
NEW QUESTION # 37
When designing a system to support Oracle OLAP Workload for a new customer with no I/O details, what are the default selections for the I/O profile input in sizer?
- A. Random Read: 50% at 32 KiB Random Write: 50% at 32 KiB
- B. Sequential Read: 80% at 8 KiB Sequential Write: 20% at 8 KiB
- C. Sequential Read: 70% at 8 KiB Sequential Write: 30% at 8 KiB
- D. Random Read: 70% at 8 KiB Random Write: 30% at 8 KiB
Answer: D
Explanation:
When designing a system to support an Oracle OLAP (Online Analytical Processing) Workload for a new customer without specific I/O details, the default selections for the I/O profile input in the sizer tool are typically set to "Random Read: 70% at 8 KiB, Random Write: 30% at 8 KiB." Here's a detailed explanation:
Oracle OLAP Workload Characteristics: OLAP workloads generally involve heavy read operations with a focus on retrieving and analyzing large datasets. The read operations are often random due to the nature of querying various parts of the data.
Default I/O Profile Selection:
Random Read: 70% - This reflects the high read intensity typical of OLAP workloads, where data is accessed non-sequentially.
Random Write: 30% - Although less frequent than reads, writes still occur randomly as new data is added or existing data is updated.
Sizer Tool Configuration: The Dell sizer tool uses these default I/O profile settings to estimate the required storage performance and capacity. This helps in designing a system that can handle the expected workload efficiently.
Performance Optimization: The chosen I/O profile ensures that the storage system is optimized for the specific access patterns of OLAP workloads, providing a balanced approach to handling both reads and writes.
NEW QUESTION # 38
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