EMC EMC Certifications DES-1D12 Questions & Answers

• Question 81:

  How many replication rules can be applied to a cluster in Dell EMC PowerStore?

  A. 16

  B. 24

  C. 32

  D. 64

  Correct Answer: C

  Limit per cluster = 32 replication rules

• Question 82:

  What is the maximum number of SAS buses per SP for a Dell Unity XT 480F without an additional SAS I/O module1?

  A. 4

  B. 3

  C. 1

  D. 2

  Correct Answer: D

  The maximum number of SAS buses per SP for a Dell Unity XT 480F without an additional SAS I/O module is 2. Each Dell Unity XT 480F has 2 Service Processors (SPs) and each SP has 2 SAS buses, for a total of 2 SAS buses per SP. SAS buses are used to connect the storage drives to the SPs and to the storage array. Each bus can support multiple drives and provide high-speed data transfer between the drives and the SPs.

• Question 83:

  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

  Correct Answer: B

  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)

• Question 84:

  A company has a Dell Unity XT 880 at its Boston site providing file storage for a business production application The company has a second remote site 8 km (5 mi) away in Cambridge A third site is in New York (342 km (213 mi) from the Boston site)

  How can the same production data be protected against system outage with a zero RPO and a maximum of 15 minutes RPO data recovery?

  A. Synchronous replicate from Boston to Cambridge Asynchronous replicate from Boston to New York

  B. Synchronous replicate from Boston to Cambridge Synchronous replicate from Boston to New York

  C. Asynchronous replicate from Boston to Cambridge Asynchronous replicate from Cambridge to New York

  D. Synchronous replicate from Boston to Cambridge Synchronous replicate from Cambridge to New York

  Correct Answer: B

  Synchronous replication will provide a zero RPO as all data is written to both the primary and secondary storage at the same time, which means any data written to the primary storage will be instantly available on the secondary storage. This configuration will ensure that the data is protected against system outage, and in case of any failure, the recovery time will be a maximum of 15 minutes as the data is already replicated to the secondary site.

• Question 85:

  A customer must protect file storage resources through asynchronous replication to other Dell Unity XT systems in different locations. What is the maximum number of remote systems that can be configured?

  A. 4

  B. 24

  C. 16

  D. 8

  Correct Answer: B

  This allows the customer to protect their file storage resources through asynchronous replication to other Dell Unity XT systems in different locations, providing a high level of data protection and disaster recovery capabilities. The asynchronous replication feature allows the customer to replicate data between systems in a way that does not affect performance, and it allows them to recover quickly from a disaster or outage.

• Question 86:

  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

  Correct Answer: D

  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 87:

  You are designing a Dell EMC PowerStore solution with a customer. They ask if they can populate Slots 0 to 10 with NVMe SSD drives.

  What should be your response?

  A. Any drive type can be populated in the remaining slots

  B. NVMe SSDs must be populated in the remaining empty slots

  C. NVMe SCM drives are required in Slots 0 through 10

  D. NVMe SCM drives must be populated in the remaining empty slots

  Correct Answer: B

  Reference: https://www.dell.com/support/manuals/en-pk/powerstore/pwrstr-hwg/base-enclosure-component-overview?guid=guid-7914a554-6943-402e-bd38-3e893163657eandlang=en-us

• Question 88:

  Which QoS option is NOT supported by Dell EMC Unity XT?

  A. Attached Snapshot

  B. Individual or Group LUN

  C. VMFS Datastore

  D. iSCSI

  Correct Answer: D

  QoS – Rate limiting

  Protect against “Noisy Neighbor”

  •

  512 Limits

  •

  More granular control

  •

  Limit by IOPS, BW, or both

  •

  Apply to:

  •

  Individual LUNs

  •

  Group of LUNs

  •

  VMFS Datastores

  •

  Attached Snapshots

  •

  Can assign total limit to be shared among LUNs in Group

  •

  Can move LUN(s) to other QoS Policy

• Question 89:

  A customer has a mixed environment consisting of Dell Unity 350F Dell Unity XT 680F. and Dell PowerStore 5000X They want to have a single interface to monitor and report on all the arrays.

  Which software tool should the technical architect recommend?

  A. CloudlQ

  B. Unisphere Analyzer

  C. Unisphere Central

  D. PowerStore Manager

  Correct Answer: A

• Question 90:

  A customer wants to asynchronously replicate file data from a production Dell Unity 550F to a remote office in the same city with a UnityVSA When attempting to replicate one of the file systems the replication option is not available.

  What should a technical architect advise the customer?

  A. Asynchronous replication is not supported to a UnityVSA

  B. The NAS server for the file system must be replicated

  C. Asynchronous replication requires a greater replication distance

  D. Only synchronous replication is supported on file systems

  Correct Answer: C

  Asynchronous replication can be used to replicate data over larger distances than synchronous replication. However, it cannot be used to replicate data between two UnityVSA systems within the same city. To replicate file data from a production Dell Unity 550F to a remote office in the same city with a UnityVSA, the technical architect should advise the customer to use synchronous replication.