EMC DES-1D12 Online Practice Questions and Exam Preparation

EMC DES-1D12 Online Questions & Answers

• Question 31:

  You are upgrading a Dell EMC Unity array to a Dell EMC PowerStore 1000 T array. The customer asks what they need to do so they can map PowerStore snapshots from the new PowerStore array to a host. What should be your response?

  A. Create a volume group of the snapshot.
  B. Create a read/write snapshot of the snapshot
  C. Create a copy of the snapshot
  D. Create a thin clone of the snapshot
  D. Create a thin clone of the snapshot

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  Explanation/Reference:

  "Volume and Volume Group Snapshots: Snapshots cannot be mapped to a host. To view the contents of a snapshot, you must first clone the snapshot then map the clone to a host."

• Question 32:

  You are designing a Dell EMC Unity solution. You need to predict its expected performance based on workload, number o and type of drives, and RAID protection. Which design path on the Midrange Sizer should you take?

  A. System Designer path
  B. Application Oriented path
  C. Quick Configuration path
  D. Performance Data Input path
  C. Quick Configuration path

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  Explanation/Reference:

• Question 33:

  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
  D. Helps keep paged metadata on FLASH media

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  Explanation/Reference:

  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 34:

  How many hierarchical snapshots are supported by Dell EMC Unity?

  A. 32 levels deep for LUNs 16 levels deep for file systems
  B. 16 levels deep for LUNs 8 levels deep for file systems
  C. 16 levels deep for LUNs 16 levels deep for file systems
  D. 10 levels deep for LUNs 10 levels deep for file systems
  D. 10 levels deep for LUNs 10 levels deep for file systems

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  Explanation/Reference:

  https://elabnavigator.emc.com/vault/pdf/EMC_Unity_ESSM.pdf (pag.22)

• Question 35:

  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?

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

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  Explanation/Reference:

• Question 36:

  DRAG DROP

  In vCenter, what is the correct order of steps to create a VM in a storage container provisioned on a Dell EMC PowerStore system?

  Select and Place:

  

  

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  Explanation/Reference:

  STEP1:VASA STEP2 :POWERSTORE CONNECTIVITY STEP3:Create vvol datastore STEP4:create vm storage policies STEP5:Provision VMs based on vvol datastore

• Question 37:

  When a remove replication operation is performed on a Dell EMC PowerStore array, what happens to the destination storage resource?

  A. Is deleted
  B. Stays in read/write mode
  C. Stays in read-only mode
  D. Taken offline
  C. Stays in read-only mode

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  Explanation/Reference:

  "Removing a replication session is initiated on the source system by removing the protection policy from the Volume or Volume Group on the source system. Removing the protection policy from a storage resource results in the following: * The destination storage resource stays in read-only mode."

• Question 38:

  A customer wants to expand their Dell EMC Unity Hybrid 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. 1
  B. 5
  C. 6
  D. 7
  C. 6

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  Explanation/Reference:

  DELL PDF document about dynamic pools: h16289-dell_emc_unity-dynamic_pools.pdf Page 20-21. The smallest RAID 5 stripe width the system supports is a 4+1. The smallest dynamic pool created with the RAID 5 4+1 configuration is 6 drives. The minimum drive count includes the number of drives specified in the stripe width, plus the hot spare capacity. The hot spare capacity is selected by the user at pool creation, and can either be set to 1 or 2 drives for every 32 drives in the pool.

• Question 39:

  What is a consequence of using an 800 GB drive and five 400 GB drives in a Dell EMC Unity XT dynamic pool?

  A. Extents 9 -14 are used to create a RAID Group
  B. Unisphere short strokes the 800 GB drive to 8 extents
  C. Extents 9 -14 are marked unavailable until more 800 GB drives are added
  D. Extents 9 -14 are marked unavailable and can never be recovered
  C. Extents 9 -14 are marked unavailable until more 800 GB drives are added

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  Explanation/Reference:

  The entire capacity of a particular drive size is only available when the drive count within the drive partnership group for the drive in question matches or exceeds the stripe width plus one drive. It is not recommended to mix different size drives of the same type for this reason, unless an adequate number of drives are available to meet or exceed the stripe width plus one drive requirement h16289-dell_emc_unity-dynamic_pools.pdf-Page 18-19

• Question 40:

  A Dell EMC PowerStore customer plans to migrate storage volumes across appliances within a cluster. They want to use minimal effort to ensure that the appliance avoids reaching full capacity. Which method is recommended?

  A. Live Migrate
  B. Assisted Migration
  C. Resource Balance
  D. Volume Placement
  B. Assisted Migration

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  Explanation/Reference:

  Assisted migration-In the background, the system periodically monitors storage resource utilization across the appliances. Migration recommendations are generated based on factors such as drive wear, appliance capacity, and health. If you accept a migration recommendation, a migration session gets automatically created.

  Reference:https://www.dell.com/support/manuals/en-pk/powerstore-1000t/pwrstr-cfg-vols/migrate-storage-resources-to-another-appliance?guid=guid-2c5f6014-60e4-43ee-928f-b537c59da869andlang=en-us