EMC EMC Certifications DES-1D12 Questions & Answers

• Question 131:

  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

  Which option should the technical architect recommend?

  A. All Unity and Unity XT systems support 25 GbE.

  B. The Unity XT 480 supports a 25 GbE card but the Unity 550F does not support a 25 GbE card

  C. The Unity 550F supports a 25 GbE card but the Unity XT 480 does not support a 25 GbE card

  D. 25 GbE is not supported on Unity or Unity XT systems

  Correct Answer: B

  The Unity XT 480 can be upgraded with the 25 GbE network cards, but the Unity 550F will not be able to support them and the customer will have to consider upgrading the Unity 550F to a newer model that supports 25 GbE.

• Question 132:

  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?

  A. 0

  B. 4

  C. 3

  D. 2

  Correct Answer: B

  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 133:

  Which feature helps to enable file service High Availability on Dell EMC PowerStore?

  A. NAS Network Heartbeat

  B. RAID protected disk drives

  C. Multiple redundant network ports with system bond

  D. Redundant nodes with Live Volume enabled

  Correct Answer: C

  Reference: https://www.delltechnologies.com/resources/en-us/asset/white-papers/products/storage/h18157-dell-emc-powerstore-clustering-high-availability.pdf

• Question 134:

  A customer has two Dell S4148FON switches which are not connected to each other The customer wants to use SMB to present NAS data directly from the array to their users The solution must have resilience in case a switch outage occurs

  Which solution should the technical architect recommend?

  A. Dell PowerStore100X

  B. Dell PowerVault ME4

  C. Dell PowerStore 1000T

  D. Dell Unity XT 480

  Correct Answer: B

  The Dell PowerVault ME4 is a storage area network (SAN) solution specifically designed for SMB environments. It provides high availability through active-active controllers and automatic failover, which ensures that data remains accessible in the event of a switch outage. By connecting the two S4148FON switches to the Dell PowerVault ME4, the customer will be able to present NAS data directly from the array to their users, and also have resilience in case of switch outage.

• Question 135:

  A customer requests a proposal for a new Dell EMC SC Series storage system with the following specifications:

  1.

  IO type: Random

  2.

  Existing data: 100 TB

  3.

  Rate of change: 2 TB per day

  4.

  Growth rate: 100 GB per day

  5.

  Snapshot retention: 1 week

  What storage capacity should be specified to scope the system with Tier 1 RAID 10 protection?

  A. 2.5 TB

  B. 4.5 TB

  C. 6.5 TB

  D. 8.5 TB

  Correct Answer: C

• Question 136:

  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. 6x 15 TB drives in the 3000T and 6x 15 TB drives in the 9000T both supporting single drive upgrades

  D. 12x 7 TB drives in the 3000T and 6x 15 TB drives in the 9000T both requiring upgrades in six drive increments

  Correct Answer: C

  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.

• Question 137:

  What is the purpose of the NVMe NVRAM drives in a Dell EMC PowerStore 9000 array?

  A. Read cache and vaulting

  B. Read cache and base OS

  C. Write cache and base OS

  D. Write cache and vaulting

  Correct Answer: D

  Reference: https://www.delltechnologies.com/en-us/collaterals/unauth/white-papers/products/storage/h18149-dell-emc-powerstore-platform-introduction.pdf (12)

• Question 138:

  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

  Correct Answer: D

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

• Question 139:

  At what granularity are blocks deduplicated on a Dell EMC PowerStore array?

  A. 4 KB

  B. 8 KB

  C. 32 KB

  D. 64 KB

  Correct Answer: A

  https://www.delltechnologies.com/resources/en-us/asset/white-papers/products/storage/h18151-dell-emc-powerstore-data-efficiencies.pdf Deduplication uses algorithms to analyze, perform pattern detection, and attempts to store only a single instance of data. In general deduplication can work at the block, bit-level, or file level. In PowerStore, deduplication works at the block level at 4 KB granularity.

• Question 140:

  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%

  Correct Answer: A

  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