EMC EMC Certifications DES-1D12 Questions & Answers

• Question 71:

  Which file resources are supported with Dell EMC Unity asynchronous replication?

  A. File systems and LUNs

  B. LUNs and VMFS datastores

  C. NAS servers and NFS datastores

  D. Consistency Groups and file systems

  Correct Answer: A

  Reference: https://www.delltechnologies.com/en-us/documentation/unity-family/unity-p-replication-config/02-unity-rep-br-workflow.htm

• Question 72:

  Which Dell EMC tool uses an HTML5 interface and best practices to predict storage performance?

  A. Unity Sizer

  B. UniSphere

  C. Midrange Sizer

  D. MiTrend

  Correct Answer: C

  The Midrange Sizer includes a Help Me Choose a Product tool for choosing SC Series or Unity products. There are sizing tools for each. Within the Midrange Sizer, the SC Sizer is an HTML5-based tool for sizing SC systems.

• Question 73:

  Which Dell PowerStore migration method is recommended to remediate an out of space condition?

  A. Assisted Migration

  B. Migrate

  C. Live Migrate

  D. Auto Placement

  Correct Answer: A

  The assisted migration allows you to move data to a new storage pool with more capacity. This process can be done while the data is still online and accessible to hosts, and it allows you to add or replace drives, expand pools, and move data to a new array without any disruption.

• Question 74:

  How many fans in a Dell EMC PowerStore node can fail before it shuts down?

  A. 1

  B. 2

  C. 3

  D. 4

  Correct Answer: A

  A node can tolerate a single fan module fault, and the surviving fans increase their speed to compensate for the faulted module. If two fan modules fault within the same node, the node performs a protective thermal shutdown. A protective thermal shutdown gracefully powers off the node, and any resource fails over to the surviving node Reference:https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h18149-dell-emc-powerstore-platform-introduction.pdf

• Question 75:

  Which NAS protocols does Dell PowerStore support?

  A. FTP, SMB, NFSv2, NFSv3, and FTPS

  B. FTPS, SMB, NFSv3, NFSv4, and FTP

  C. SMB, NFSv3, NFSv4p, FTP, and SFTP

  D. NFSv4, SMB, S3, FTP, and SFTP

  Correct Answer: C

  Dell PowerStore supports a variety of NAS protocols to provide file access to clients. These protocols include:

  SMB (Server Message Block): This protocol is used to provide file and printer sharing on Windows-based systems.

  NFSv3 (Network File System version 3): This is a standard protocol used to provide file access on UNIX-based systems.

  NFSv4 (Network File System version 4): This is the latest version of the NFS protocol and it provides enhanced security and improved performance over previous versions.

  FTP (File Transfer Protocol): This is a standard protocol used to transfer files between computers over a network.

  SFTP (Secure File Transfer Protocol): This is an extension of the FTP protocol that provides secure file transfer using SSH (Secure Shell) encryption.

• Question 76:

  Which parameters can be selected when sizing a Dell Unity XT 480F using the System Design method?

  A. Drive count and RAID level Percentage of random writes and reads

  B. Data reduction ratio Percentage of sequential writes and reads

  C. One of four workload types Drive count and RAID level

  D. One of two block sizes Application type

  Correct Answer: C

  When sizing a Dell Unity XT 480F using the System Design method, you can select one of four workload types and Drive count and RAID level. This workload type selection will take into account the specific IOPS and capacity requirements of the environment. The drive count and RAID level will determine the overall capacity and level of data protection required.

• Question 77:

  A storage administrator is trying to create a new hybrid pool on their Dell Unity XT 680 They want to add

  1.

  18x3.84 TBSSD drives

  2.

  72x 1200 GB 10K SAS drives

  3.

  64x 12 TBNLSAS drives

  However, this action is not being permitted by the Unity software. What is the reason for this'>

  A. 3.84 TB SSD are only supported in all flash pools

  B. There are too many disks in the SAS tier

  C. 12 TB NLSAS drives are only permitted in archive pools

  D. The pool must be created with only a single drive type

  Correct Answer: A

  The storage administrator is not able to create a new hybrid pool on their Dell Unity XT 680 because the 3.84 TB SSD drives are only supported in all flash pools. Dell Unity XT supports the use of SSDs in all-flash pools, where the entire pool is built from SSD drives, to provide high performance for I/O-intensive workloads.

• Question 78:

  You are sizing a new Dell EMC SC Series array. Upon analyzing the Live Optics report, you find the current system has a peak throughput of 4687 MB. What is the minimum number of 10Gb iSCSI front-end ports required to meet the throughput needs?

  A. 8

  B. 10

  C. 12

  D. 16

  Correct Answer: A

• Question 79:

  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. Isolates file top-talkers I/O from block data I/O

  B. Improves compression space efficiencies

  C. Provides an additional data redundancy layer

  D. Helps keep paged metadata on FLASH media

  Correct Answer: D

  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.

• Question 80:

  Which network option should be configured to provide the best iSCSI performance on a Dell Unity XT array?

  A. A iSCSI offload

  B. Single VLAN for all traffic

  C. Jumbo frames

  D. Disable flow control

  Correct Answer: A

  iSCSI offload is a network option that can be configured to provide the best iSCSI performance on a Dell Unity XT array. This option offloads iSCSI processing to the network adapter card, reducing the load on the host CPU and improving performance. With iSCSI offload enabled, the network adapter card can handle iSCSI processing tasks such as packet segmentation and reassembly, reducing the CPU overhead associated with iSCSI operations. Other options such as using a single VLAN for all traffic, configuring jumbo frames and disabling flow control may also help to improve iSCSI performance but iSCSI offload would provide the best results. It is important to note that configuring jumbo frames could have a positive impact on performance, but it also depends on the network infrastructure and the NICs support for it. Disabling flow control could cause issues on congested networks, so it's important to test it before disabling it.