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NEW QUESTION # 33
The CPU utilization in a Dell Unity XT system is currently at 68% What is the level of CPU utilization?
- A. High Utilization
- B. Low Utilization
- C. Extremely High Utilization
- D. Normal Utilization
Answer: D
NEW QUESTION # 34
Which two workload parameters are required to proceed with sizing for a PowerStore solution?
(Select 2)
- A. Effective Capacity
- B. IOPS
- C. Data reduction ratio
- D. Response time
Answer: A,B
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 # 35
What is achieved by adding a top tier of SSDs when designing a Dell Unity XT hybrid solution with FAST VP and FAST Cache?
- A. Improves compression space efficiencies
- B. Isolates file top-talkers I/O from block data I/O
- C. Provides an additional data redundancy layer
- D. Helps keep paged metadata on FLASH media
Answer: D
Explanation:
FAST VP (Fully Automated Storage Tiering for Virtual Pools) and FAST Cache (Fully Automated Storage Tiering for Cache) are features that allow you to optimize the performance of your storage by automatically moving data between different storage tiers based on usage patterns.
The SSD tier is used to store frequently accessed metadata, such as file system structures, directories, and inode tables, which are accessed frequently and are small enough to fit in the SSD cache. Keeping paged metadata on flash media improves the overall system performance, as it allows for faster access to the metadata, reducing the latency and the number of I/O operations needed to access it.
NEW QUESTION # 36
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 1920 NVMe SSD drives
- B. 6 x 750 GB NVMe SCM drives
- C. 6 x 3840 NVMe SSD drives
Answer: C
Explanation:
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.
NEW QUESTION # 37
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. Three of the drives will be added with a fourth reserved as spare.
- B. Only half of the capacity of the new drives will be available.
- C. The mixing of drive types is not supported, and the operation will fail.
- D. The full capacity of the drives will be available.
Answer: B
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 # 38
What information must a solution architect gather before they start designing a storage solution?
- A. LAN, SAN ,and Customer workload requirements
- B. Network Infrastructure, storage, and Customer workload performance requirements
- C. LAN, SAN, and IOPS requirements
- D. Application response, LANand WAN requirements
Answer: C
NEW QUESTION # 39
A solution architect is sizing a new Dell Unity XT array that requires hybrid dynamic pools. Which option must be selected in Midrange Sizer?
- A. Quick Configuration
- B. Advanced Performance
- C. Application Oriented
- D. System Designer
Answer: A
Explanation:
When sizing a new Dell Unity XT array that requires hybrid dynamic pools, the "Quick Configuration" option must be selected in the Midrange Sizer. This option streamlines the configuration process, allowing for a balanced and efficient setup of hybrid pools. Here's why Quick Configuration is used:
Simplifies Setup: Quick Configuration provides a straightforward approach to setting up the array, ensuring that the necessary parameters for hybrid dynamic pools are configured correctly without requiring in-depth manual input.
Balanced Performance: The tool uses predefined settings and best practices to create a hybrid pool that balances performance and capacity, making it ideal for a variety of workloads.
NEW QUESTION # 40
What is recommended maximum cable length for PowerStore back-end NVMe cabling to avoid performance issues?
- A. 100 meters
- B. 3 meters
- C. 5 meters
- D. 10 meters
Answer: D
NEW QUESTION # 41
When sizing a Dell Unity XT hybrid system, for which class of data are NL-SAS drives sized?
- A. Compressed
- B. Active
- C. Deduplicated
- D. Inactive
Answer: D
NEW QUESTION # 42
When designing a Dell EMC SC Series system, which factors regarding general performance are important to understand?
- A. Latency and queue depth
- B. Write size and latency
- C. Transport and queue depth
- D. Block size and read size
Answer: A
Explanation:
"Whether gathering information or designing a system, it is important to understand two commonly used terms: Latency and queue depth"
NEW QUESTION # 43
What initiates an automatic NAS server failover to the peer SP?
- A. Assisted internal migration
- B. Network link failure
- C. SP hardware fault
- D. Resource balancing algorithm
Answer: C
Explanation:
An automatic NAS server failover to the peer Storage Processor (SP) is initiated by an SP hardware fault.
This failover mechanism ensures high availability and continuous access to data by moving the NAS server's operations to the functioning SP when a hardware fault is detected in the primary SP.
Reference:
Dell EMC Unity NAS Server High Availability Guide.
Dell Technologies documentation on NAS server failover.
NEW QUESTION # 44
Which describes cascade replication on the Dell Unity XT platform?
- A. Synchronous replication of a block resource from Sites A to B, then B to C, then C to D
- B. Asynchronous replication of a file resource from Sites A to B, then B to C, then C to D
- C. Asynchronous replication of a block resource from Sites A to B, then B to C, then C to D
- D. Synchronous replication of a file resource from Sites A to B, then B to C, then C to D
Answer: C
Explanation:
Cascade replication on the Dell Unity XT platform describes the process where a block resource is replicated asynchronously from one site to another in a sequential manner. Here's how it works:
* Site A to Site B:The block resource is first replicated asynchronously from Site A to Site B.
* Site B to Site C:After the replication from A to B is complete, the resource is then replicated from Site B to Site C.
* Site C to Site D:Finally, the resource is replicated from Site C to Site D.
This cascade replication method allows for efficient data protection and disaster recovery across multiple sites.
References:
* Dell Technologies Unity XT Replication Guide
* Dell Entry-Level and Mid-Range Storage Community
NEW QUESTION # 45
What drive type is recommended for storing inactive data on a Dell Unity XT 880F array?
- A. SAS 10K
- B. NL-SAS
- C. SAS Flash
Answer: C
NEW QUESTION # 46
What can be done to provide best performance on Dell Unity iSCSI connections?
- A. Configure LACP on all connections.
- B. Utilize FSN on hosts.
- C. Configure Flow control on all ports.
- D. Configure Jumbo frames end-to-end.
Answer: D
Explanation:
To provide the best performance on Dell Unity iSCSI connections, configuring Jumbo frames end- to- end is recommended. Jumbo frames allow for larger packet sizes than the standard 1500 bytes, typically up to 9000 bytes. This reduces the number of packets transmitted, decreases CPU utilization, and improves overall network efficiency. Here's how to configure Jumbo frames:
Switch Configuration: Enable Jumbo frames on all network switches that will handle iSCSI traffic.
Network Interface Configuration: Configure all network interfaces (NICs) on the storage system and the iSCSI hosts to support Jumbo frames.
End-to-End Consistency: Ensure that Jumbo frames are configured consistently across the entire network path from the storage system to the hosts to avoid fragmentation and performance degradation.
NEW QUESTION # 47
A customer has a Dell Unity XT array with a dynamic pool of six 600 GB drives using RAID 5 protection. They ask you for guidance about their plan to increase capacity by adding seven 600 GB drives with RAID 6 protection.
What should be your response?
- A. Unisphere allows them to change the RAID width
- B. Add the drives, then use UEMCLI to change the RAID width
- C. RAID width set in drive partnership groups cannot be changed
- D. Start a new drive partnership group with seven 600 GB drives
Answer: C
NEW QUESTION # 48
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. Reduces maintenance and rebuild time
- C. Decreases ware-leveling, performance and redundancy requirements
- D. Lowers physical space power and cooling requirements
Answer: D
Explanation:
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.
NEW QUESTION # 49
Which two options allow the collection of telemetry files when evaluating an existing Dell Unity XT system configuration? (Select 2)
- A. unity_telemetry_data collects
- B. PSTCLI
- C. unity_service_data collects
- D. UEMCLI
Answer: C,D
Explanation:
When evaluating an existing Dell Unity XT system configuration,telemetry data(health and performance logs) is crucial for diagnostics and performance analysis. Dell Unity XT providestwo primary methodsfor collecting telemetry files:
#A. unity_service_data collects
This is a common method using the svc_data command to gather comprehensive logs and telemetry data for Dell Unity XT systems.
The commandcollects service dataincluding health, performance, and diagnostic logs.
It is often used by support engineers and system administrators to troubleshoot and evaluate system health.
#B. UEMCLI
UEMCLI (Unity CLI) is a command-line interface for managing Dell Unity systems.
It provides commands to collect telemetry and diagnostic information.
For example, you can use commands like:
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uemcli -d <ip> -u <user> -p <password> /service/system/collect-service-data UEMCLI is flexible, scriptable, and often used in automated telemetry collection for system evaluations.
#Why not the other options?
C). PSTCLI- This CLI is used with PowerStore systems, not Unity XT.
D). unity_telemetry_data collects- This is not a valid or recognized command within Unity XT's official documentation or CLI reference.
#Documentation Reference:
Dell EMC Unity: Service Commands and Diagnostics Guide (Dell Technologies) Dell EMC Unity XT CLI Command Reference Guide (UEMCLI usage) Dell EMC Unity XT Best Practices Guide- covers recommended methods for collecting and using service data and telemetry files.
NEW QUESTION # 50
What initiates an automatic NAS server failover to the peer SP?
- A. Assisted internal migration
- B. Network link failure
- C. SP hardware fault
- D. Resource balancing algorithm
Answer: C
Explanation:
An SP hardware fault initiates an automatic NAS server failover to the peer SP in Dell Unity systems. This ensures that the NAS services remain available in case of hardware failure in one of the Storage Processors (SPs). The failover process is automatic and transparent to the hosts accessing the data, and it helps to maintain the high availability of the NAS services.
NEW QUESTION # 51
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