EMC DES-1D12 Online Practice Questions and Exam Preparation

EMC DES-1D12 Online Questions & Answers

• Question 131:

  A systems administrator has deployed a DellUnity XT 380F with 90x 1.92 TB SSDs in a dynamic pool How many drives are allocated as spare space?

  B. 4
  C. 3
  D. 2
  B. 4

  ---

  Explanation/Reference:

  The Dell Unity XT 380F has a default spare space allocation of 4% of the total number of drives in a dynamic pool. So with 90x 1.92 TB SSDs, 4 drives will be allocated as spare space. These spare drives are used to automatically replace a failed drive, ensuring data availability and protection.

• Question 132:

  What is the minimum recommended amount of Flash capacity in a Dell EMC Unity 480 Hybrid pool?

  A. 5%
  B. 8%
  C. 10%
  D. 15%
  A. 5%

  ---

  Explanation/Reference:

  The minimum recommended Flash capacity is at least 5% of the pool capacity.

  Reference:

  https://www.dell.com/support/kbdoc/en-pk/000010691/dell-emc-unity-difference-between-fast-cache-and-fast-vp-configurations-user-correctable

• Question 133:

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

  ---

  Explanation/Reference:

  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 134:

  A customer has a fully scaled-out Dell PowerStore T cluster and wants to ensure that PowerStore Manager is in a highly available configuration How many instances of PowerStore Manager should be installed, and why?

  A. Four A customer should install one instance per appliance in the cluster
  B. Zero PowerStore Manager runs highly available by default
  C. Eight A customer should install one instance per node in the cluster
  D. Two PowerStore Manager needs at least two instances for a highly available configuration
  D. Two PowerStore Manager needs at least two instances for a highly available configuration

  ---

  Explanation/Reference:

  A fully scaled-out Dell PowerStore T cluster requires at least two instances of PowerStore Manager to ensure high availability. This is because the PowerStore Manager provides a centralized management and monitoring interface for the cluster, and having multiple instances of it allows for redundancy in case one instance becomes unavailable.

• Question 135:

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

  A. Consistency Groups and file systems
  B. VMFS and NFS datastores
  C. LUNs and file systems
  D. LUNs and VMFS datastores
  D. LUNs and VMFS datastores

  ---

  Explanation/Reference:

  Reference:https://cdn2.hubspot.net/hubfs/1885982/dell-emc-unity-unisphere-overview.pdf?t=1543339206682

• Question 136:

  Which methods are available to migrate storage resources from one Dell PowerStore appliance to another within the same cluster?

  A. Assisted Migration and Live Migrate
  B. Migrate and Assisted Migration
  C. Assisted Migration and Volume Motion
  D. Volume Motion and Live Migrate
  C. Assisted Migration and Volume Motion

  ---

  Explanation/Reference:

  The Dell PowerStore appliance provides two methods to migrate storage resources within the same cluster: Assisted Migration and Volume Motion. Assisted Migration: This method allows the administrator to manually initiate and control the

  migration process, and it allows for the migration of individual resources such as LUNs, file systems and snapshots.

  Volume Motion: This method allows the administrator to move a LUN or file system from one storage pool to another on the same PowerStore appliance or within the same cluster. This is done without any disruption to the hosts accessing the

  data and it can be automated with the use of policies.

  It's important to note that the Live Migrate and Migrate options are not available to migrate storage resources within the same cluster in Dell PowerStore.

• Question 137:

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

  A. 1
  B. 2
  C. 3
  D. 4
  A. 1

  ---

  Explanation/Reference:

  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 138:

  What is the maximum number of data drives that can be put in to a Dell PowerStore 1000T base enclosure?

  A. 23
  B. 21
  C. 25
  D. 24
  B. 21

  ---

  Explanation/Reference:

  The maximum number of data drives that can be put in to a Dell PowerStore 1000T base enclosure is 21. The Dell PowerStore 1000T has a 2U form factor, and it supports a maximum of 21 drives in the base enclosure. The drives can be either SAS or NVMe, and it's important to keep in mind that the maximum capacity of the system depends on the type of drives that are used. It's important to note that the PowerStore 1000T supports up to 2 expansion shelves that can hold an additional 21 drives each, for a maximum of 63 drives in total. Also, the PowerStore 1000T supports up to 4 NVRAM modules that are used to cache metadata and improve performance.

• Question 139:

  A database volume on a Dell PowerStore cluster has a Protection Policy that is applied with a single snapshot rule The policy takes a snapshot every hour and retains them for 48 hours The storage administrator must present a copy of the database volume to a test environment

  Which action does the storage administrator take to meet this requirement?

  A. Restore the snapshot to a new test volume
  B. Create a thin clone of the database volume and map it to the test host
  C. Create a new snapshot policy for the test volume
  D. Create a snapshot of the database volume and map it to the test host
  B. Create a thin clone of the database volume and map it to the test host

  ---

  Explanation/Reference:

  A thin clone is a writeable copy of a volume, which shares the same data blocks as the parent volume. This allows the administrator to provide a copy of the production database volume to the test environment without affecting the production data. It also allows to test the data without affecting the production data, and also it doesn't require additional storage space.

• Question 140:

  A storage administrator wants to do a tech refresh from a legacy EQL system to a new Dell EMC SC Series array. What is needed to correctly size the new array?

  A. Latency
  B. Peak IOPS information
  C. Storage tiers
  D. Contract support end date
  B. Peak IOPS information

  ---

  Explanation/Reference:

  https://downloads.dell.com/manuals/common/sc-series-performance-availability-best-practices-dell-emc-4024-bp-sc_en-us.pdf (1.9 Sizing an SC Series array for performance requirements-pag.9)