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質問 # 37
A technical architect is designing a Dell Unity XT 480 using the System Designer option of Sizer.
What is the recommended minimum amount of Flash that they should specify?
- A. 15%
- B. 7%
- C. 5%
- D. 10%
正解：B
解説：
7% is the recommended minimum amount of Flash that a technical architect should specify when designing a Dell Unity XT 480 using the System Designer option of Sizer. This is because, Unity XT storage systems require a certain amount of flash storage to handle system-wide functions such as metadata, snapshots and other storage services.
質問 # 38
What is the recommended option when configuring Dell EMC PowerStore nodes for High Availability?
- A. Active/Active
- B. Active/Passive
- C. Synchronous Replication
- D. Active/Passive with AULA
正解：C
解説：
Reference: https://www.delltechnologies.com/asset/en-us/products/storage/industry- market/h18157-dell-emc-powerstore-clustering-high-availability.pdf
質問 # 39
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. Sequential Read: 70% at 8 KiB Sequential Write: 30% at 8 KiB
- B. Random Read: 70% at 8 KiB Random Write: 30% at 8 KiB
- C. Sequential Read: 80% at 8 KiB Sequential Write: 20% at 8 KiB
- D. Random Read: 50% at 32 KiB Random Write: 50% at 32 KiB
正解：A
解説：
Explanation:
質問 # 40
Which two options are input parameters for Unity Designer? (Select 2)
- A. Host Access Modes
- B. NAS Server Nodes
- C. Enclosures
- D. Block and File resources
- E. Drive Modules
正解：E
解説：
Unity Designer is a tool used to design and configure Dell EMC Unity storage systems. Two of the key input parameters for Unity Designer are Block and File resources, which include configuring LUNs, NAS servers, and file systems, and Drive Modules, which refer to the physical drives and their configurations within the storage system.
質問 # 41
Which features were introduced in SCOS 7.3?
- A. Data-in-Place upgrade for SC4020 and 4K HDD support
- B. CloudlQ support and Cross Platform Replication
- C. Distributed Sparing and Live Volume ALUA
- D. Unisphere for SC and Live Volume Auto-failover
正解：A
質問 # 42
Which two statements are correct for a PowerStore 5200T with mixed SSD and drive combination? (Select 2)
- A. SSD drives are used for metadata tiering
- B. Expansion Enclosures are supported
- C. NVMe drives are not used for Caching and Vaulting
- D. SCM drives do not add to usable capacity
正解：B、D
質問 # 43
A customer has a data center with applications running on 16 volumes that are presented from a Dell Unity XT system. They want to design a DR site within metro distance with zero RPO using storage-based replication.
According to Dell best practices, which design approach minimizes the impact on storage performance?
- A. Use multiple ports per controller for replication.
- B. Create the synchronous replication session before filling the source storage object with data.
- C. Use Thick volumes within the replication group.
- D. Include a Flash tier in a hybrid pool where synchronous replication is active.
正解：D
解説：
* Dell Unity XT and DR Design:
* For disaster recovery (DR) within a metro distance and zero Recovery Point Objective (RPO), synchronous replication is the preferred method.
* Synchronous replication ensures that data is written to both the source and target volumes simultaneously, which requires high performance to minimize latency.
* Best Practices for Minimizing Impact on Performance:
* Multiple Ports per Controller: While this can improve throughput, it does not directly minimize the latency impact of synchronous replication.
* Flash Tier in Hybrid Pool: Including a flash tier in a hybrid pool enhances performance significantly because flash drives offer lower latency and higher IOPS compared to traditional spinning disks. This is critical for synchronous replication scenarios where performance impact needs to be minimized.
* Thick Volumes: Using thick volumes can provide consistent performance, but they do not inherently minimize the impact of synchronous replication.
* Synchronous Replication Session: Creating the replication session before filling the source storage object with data is a procedural step and does not address performance during active replication.
* Dell Midrange Storage References:
* Dell Unity XT best practices emphasize the use of flash tiers in hybrid pools to boost performance for demanding operations, including synchronous replication.
* Resources from Dell Technologies' documentation on storage-based replication and performance optimization provide detailed insights.
References:
* Dell Unity XT Best Practices
* Dell Community on Midrange Storage
* Dell Storage Product Information
質問 # 44
What is the maximum throughput per port in backend 12 GB SAS ports in Dell Unity XT arrays?
- A. 25,000 Mbps
- B. 2,500 Mbps
- C. 250 Mbps
- D. 2,000 Mbps
正解：B
解説：
The maximum throughput per port in backend 12 Gb SAS (Serial Attached SCSI) ports in Dell Unity XT arrays is 2500 Mbps. SAS ports are used to connect storage devices and provide high-speed data transfer capabilities:
* 12 Gb SAS Standard:The 12 Gb SAS standard supports high data transfer rates, making it suitable for enterprise storage systems that require robust performance and reliability.
* Performance Metrics:Each 12 Gb SAS port can achieve up to 2500 Mbps, which translates to approximately 2.5 Gbps of throughput, supporting high-performance storage operations.
References:
* Dell Technologies Unity XT Technical Specifications
* Dell Entry-Level and Mid-Range Storage Community
質問 # 45
Which are benefits of choosing the highest capacity flash drives when designing a Dell Unity XT All-Flash system?
- A. Enhances data security and system boot time
- B. Lowers physical space power and cooling requirements
- C. Reduces maintenance and rebuild time
- D. Decreases ware-leveling, performance and redundancy requirements
正解：B
解説：
Choosing the highest capacity flash drives when designing a Dell Unity XT All-Flash system can provide several benefits, including lower physical space, power and cooling requirements.
Additionally, higher capacity drives can also improve system boot time, reduce maintenance and rebuild time, and decrease wear-leveling, performance, and redundancy requirements.
質問 # 46
A customer is using an older host OS that uses a 63-block disk header. What is the recommended host offset when connected to Dell Unity XT systems?
- A. 63 MB
- B. 64 MB
- C. 1 MB
- D. 16 MB
正解：C
解説：
A customer has two Dell Unity arrays, a Dell Unity 550F, and a Dell Unity XT 480. They are undergoing a network refresh and would like to modernize to a 25 GbE network. The customer has asked the technical architect about adding 25 GbE network cards to the Unity systems. Both systems have free slots.
質問 # 47
In Dell EMC PowerStore storage, if the remote cluster has multiple appliances, then what automatically chooses the destination appliance for the resource?
- A. Resource Balancer
- B. Performance Policy
- C. Master appliance
- D. Source array
正解：A
解説：
From the POWERSTORE ADMINISTRATION PARTICIPANT GUIDE, " Resource balancer also considers the the following when placing volumes: Whether the appliance is offline Appliance failure status Capacity utilization
質問 # 48
Which two workload parameters are required to proceed with sizing for a PowerStore solution? (Select 2)
- A. IOPS
- B. Data reduction ratio
- C. Response time
- D. Effective Capacity
正解：A、D
解説：
* 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.
* Other Parameters:
* Response Time: While important for performance, it is not typically required to proceed with sizing.
* Data Reduction Ratio: Influences effective capacity but is not a direct input for initial sizing.
* Dell Midrange Storage References:
* Dell PowerStore documentation provides detailed guidelines on the parameters needed for accurate sizing.
* Community forums and support resources from Dell Technologies offer additional insights and best practices.
References:
* Dell PowerStore Sizing Guide
* Dell Community on Storage Sizing
質問 # 49
Which Dell EMC Unity feature provides network high availability with active-passive ports when provisioning File storage for a NAS client?
- A. Link Aggregation
- B. Preferred Interfaces
- C. Fail-safe Networking
- D. Redundant Interfaces
正解：C
解説：
Document: docu71319_dell-emc-unity-high-availability-a-detailed-review.pdf Page: 20 FAIL SAFE NETWORKING (FSN) Dell EMC Unity OE version 4.2.1 introduces Fail Safe Networking (FSN).
FSN is a high availability feature that extends link failover into the network by providing switch- level redundancy. FSN appears as a single link with a single MAC address and potentially multiple IP addresses. FSN can consists of Ethernet ports, link aggregations, or any combination of the two. FSN adds an extra layer of availability to link aggregations alone as link aggregations provide availability in the event of a port failure while FSN provides availability in the event of a switch failure. Each port or Link aggregation is considered as a single connection and only the primary port or link aggregation in an FSN is active at a time. All ports in an FSN must have the same MTU size, but the speed and duplex settings can vary.
質問 # 50
A PowerStore system has been successfully designed in PowerSizer, and the configuration must be created for the customer.
What is the most time-efficient way to generate the proposal?
- A. Export configuration in PowerSizer.
Download XML file with storage configuration.
Import XML file in Configuration tool. - B. Export configuration in PowerSizer.
Download PPTX export files.
Import PPTX file into configuration tool. - C. Export configuration in PowerSizer.
Copy PowerStore configuration ID.
Paste configuration number in Configuration tool. - D. Export configuration in PowerSizer.
Download PPTX export files.
Open PPTX file.
Copy PowerStore configuration ID.
Paste configuration number in Configuration tool.
正解：C
質問 # 51
Which two options allow the collection of telemetry files when evaluating an existing Dell Unity XT system configuration? (select 2)
- A. UEMCLI
- B. PSTCLI
- C. unity_telemetry_data collects
- D. unity_service_data collects
正解：A、D
質問 # 52
A customer asks you about the maximum load of their new Dell EMC SC Series array.
Which term should you use in response?
- A. IOPS
- B. MB
- C. Latency
- D. CPU Cycles
正解：A
解説：
Reference: https://downloads.dell.com/manuals/common/sc-series-performance-availability-best- practices-dell-emc-4024-bp-sc_en-us.pdf
質問 # 53
When designing a system to support Oracle OLAP Workload for a new customer with no I/O detailswhat are the default ......
- A. Sequential Read:70% at 8KiB
Sequential write:30% at 8KiB - B. Random Read:70% at 8KiB
Random write:30% at 8KiB - C. Sequential Read:80% at 8KiB
Sequential write:20% at 8KiB - D. Random Read:50% at 32KiB
Random write:50% at 32KiB
正解：C
質問 # 54
Which two workload parameters are required to proceed with sizing for a PowerStore solution?
(select 2)
- A. IOPS
- B. Data reduction ratio
- C. Response time
- D. Effective Capacity
正解：A、D
質問 # 55
Which tool can be used for proactive monitoring and anomalies detection for a Unity environment?
- A. CloudIQ
- B. InsightIQ
- C. Unisphere
- D. ArrayconfigAnalyzer
正解：A
解説：
Dell provides several tools for monitoring and managing Unity environments, each with specific capabilities for performance analysis, anomaly detection, and proactive maintenance.
CloudIQ:
CloudIQ is a cloud-based application that offers proactive monitoring and anomaly detection for Dell storage environments, including Unity.
It leverages advanced analytics and machine learning to provide insights into system health, performance trends, and potential issues before they impact operations.
Other Tools:
InsightIQ: Primarily used for monitoring Isilon and PowerScale systems, not Unity.
Unisphere: Provides management and monitoring for Unity but lacks the advanced anomaly detection capabilities of CloudIQ.
ArrayconfigAnalyzer: Used for specific configuration analysis and not for continuous proactive monitoring.
質問 # 56
A customer has a PowerStore 3200T system with only base enclosure consisting of 15 SSD 1920 GB drives and wants to expand the available capacity. What is the most cost-effective drive addition from a raw and usable capacity perspective to achieve the result wanted by the customer?
- A. 6 x 750 GB NVMe SCM drives
- B. 6 x 3840 NVMe SSD drives
- C. 6 x 1920 NVMe SSD drives
正解：B
解説：
Adding 6 x 3840 GB NVMe SSD drives is the most cost-effective way to expand the capacity of a PowerStore 3200T system. This addition provides a significant increase in both raw and usable capacity, offering a better balance of performance and cost compared to smaller or more expensive drive options.
Reference:
Dell EMC PowerStore Specification Sheet.
Dell EMC PowerStore Configuration Guide.
質問 # 57
A solutions architect must present two different Dell PowerStore options to a customer Both options must contain 90 TB raw in the smallest drive configuration possible A 3000T and a 9000T are the two models requested. The customer wants to know the minimum drive count necessary to perform a capacity upgrade Which solution should be recommended?
- A. A 6x 15 TB drives in the 3000T and 6x 15 TB drives in the 9000T both requiring upgrades in six drive increments
- B. 6x 15 TB drives in the 3000T and 12x 7 TB drives in the 9000T both supporting single drive upgrades
- C. 12x 7 TB drives in the 3000T and 6x 15 TB drives in the 9000T both requiring upgrades in six drive increments
- D. 6x 15 TB drives in the 3000T and 6x 15 TB drives in the 9000T both supporting single drive upgrades
正解：D
解説：
This option provides the smallest drive configuration possible for both the 3000T and 9000T models, and allows for single drive upgrades, which is more flexible for the customer.
質問 # 58
A customer wants to expand their Dell Unity XT All Flash system, which includes a pool of 64 drives in a RAID 5 (4+1) configuration.
What is the minimum number of drives needed to expand the pool?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
質問 # 59
Which low-latency workload type is a best practice for an all-SCM Dell PowerStore array?
- A. Backup workloads
- B. Media streaming workloads
- C. Small block workloads
- D. Large block workloads
正解：C
質問 # 60
While sizing a PowerStore solution with 5 TB usable capacity and 5000 IOPS for a Test/Development Application using NVMe drives,....
What action must the architect take?
- A. Configure the Unity solution as an alternative
- B. Change the DRR of the solution
- C. Change the DRE Tolerance Parity in System Editor
正解：C
質問 # 61
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