D-MSS-DS-23 sample questions

Question 1

A storage administrator is configuring asynchronous replication for a critical file system between two Dell Unity XT arrays. The primary business requirement is to minimize the potential for data loss in a disaster, which translates to the lowest possible Recovery Point Objective (RPO). Which setting should be configured for the replication session to meet this requirement?

Accepted Answer

An RPO of 5 minutes with automatic synchronization.

Answer

An RPO of 60 minutes with automatic synchronization.

Answer

An RPO of 0 (zero) to enable synchronous mode.

Answer

A manually triggered synchronization schedule.

Question 2

True or False: On a Dell PowerStore X array, AppsON allows for the direct deployment of VMware virtual machines on the appliance, but it does not support running containerized applications using Kubernetes.

Accepted Answer

False

Answer

True

Question 3

A consultant is using the Midrange Sizer tool to design a Dell Unity XT 480F solution for a mixed workload environment consisting of SQL databases and file shares. The customer has provided detailed IOPS, capacity, and growth requirements. Which TWO of the following are direct outputs or deliverables from the Midrange Sizer tool that can be presented to the customer? (Select TWO)

Accepted Answer

A Bill of Materials (BOM) for the proposed hardware.

Accepted Answer

A configuration worksheet detailing the proposed system layout.

Answer

A detailed network switch configuration script.

Answer

A formal Statement of Work (SOW) for implementation services.

Answer

A host-level MPIO configuration guide.

Question 4

**Case Study:**

A mid-sized manufacturing company is refreshing its aging storage infrastructure, which currently consists of a legacy Fibre Channel SAN. The company runs a critical ERP system on a physical Oracle database server and a large VMware cluster for development, testing, and corporate applications. They have acquired a new Dell PowerStore 5000T array to consolidate these workloads.

The IT team's primary objectives are to ensure a non-disruptive migration for the production Oracle ERP system and to simplify storage management for the VMware environment. The Oracle database is highly sensitive to I/O latency, and the business has mandated zero downtime for its migration. The VMware administrators want to manage storage provisioning directly from vCenter to streamline their workflows.

The network infrastructure includes a 16Gb Fibre Channel SAN and a 10GbE iSCSI network. The IT team is small, so operational simplicity is a key factor in the solution design. They are concerned about the complexity of migrating the physical Oracle server's data LUNs while the application is running.

Which design and migration strategy best meets all the company's requirements?

Accepted Answer

Utilize the native PowerStore import functionality for a block import of the Oracle LUNs from the legacy array. For VMware, configure vVols over Fibre Channel and register the VASA provider in vCenter.

Answer

Use host-based replication for the Oracle server and configure VMFS datastores over iSCSI for the VMware cluster. Manage the array using PowerStore Manager.

Answer

Schedule a maintenance window to shut down the Oracle server, use SAN Copy to move the data, and then present the LUNs from the PowerStore. For VMware, use NFS datastores to simplify management.

Answer

Virtualize the Oracle server using VMware P2V and then use Storage vMotion to migrate it to a new VMFS datastore on the PowerStore. Configure standard LUNs and VMFS datastores for the entire VMware cluster.

Question 5

An architect is designing a storage solution for a new application that will have highly variable and unpredictable I/O patterns. The initial deployment is small, but it is expected to grow rapidly. To optimize storage costs, the architect wants to allocate physical capacity only as it is written by the application. Which Dell Unity XT feature should be used for the application's LUNs?

Accepted Answer

Thin Provisioning

Answer

Thick Provisioning

Answer

FAST VP Tiering

Answer

Data Reduction

Question 6

A customer wants to deploy a Dell PowerStore array and has a workload characterized by a high percentage of small, random reads and a working set size that is approximately 10% of the total dataset size. To accelerate performance for this workload, which Unity feature's equivalent concept in PowerStore should the designer focus on?

Accepted Answer

PowerStore's ability to use NVMe SCM drives as metadata tier.

Answer

PowerStore's support for NVMe expansion shelves.

Answer

PowerStore's dynamic RAID resiliency.

Answer

PowerStore's unified architecture for block and file.

Question 7

When planning a non-disruptive OS upgrade on a clustered Dell PowerStore T array, what is a mandatory pre-requisite step that must be performed using the Pre-Upgrade Health Check (PUHC) tool or its equivalent in PowerStore Manager?

Accepted Answer

Validate the health and state of the cluster and its components.

Answer

Manually fail over all resources to a single node.

Answer

Disconnect all host connections to the secondary node.

Answer

Increase the size of the system's cache.

Question 8

A financial institution is designing a disaster recovery solution between two data centers using Dell Unity XT arrays with native asynchronous replication. The primary data center hosts a database with a Recovery Time Objective (RTO) of 15 minutes and a Recovery Point Objective (RPO) of 30 minutes. The network link between sites has 20ms latency. Which statement accurately describes the suitability of the proposed replication method?

```mermaid
graph TD
subgraph Primary DC
DB[Database] --> UnityA[Unity XT Array]
end
subgraph DR DC
UnityB[Unity XT Array]
end
UnityA -- "Async Replication (20ms latency)" --> UnityB
```

Accepted Answer

The solution is suitable because asynchronous replication can be configured with an RPO of 5 minutes, which is better than the required 30 minutes.

Answer

The solution is unsuitable because asynchronous replication cannot meet a 15-minute RTO.

Answer

The solution is unsuitable because the 20ms latency requires synchronous replication.

Answer

The solution is suitable only if the RPO is set to exactly 30 minutes to conserve network bandwidth.

Question 9

What is the primary role of the VASA (vSphere APIs for Storage Awareness) provider when implementing vSphere Virtual Volumes (vVols) with a Dell PowerStore array?

Accepted Answer

It acts as a control plane communication channel between vCenter and the PowerStore array.

Answer

It provides a direct data path between ESXi hosts and the PowerStore array.

Answer

It manages the iSCSI or Fibre Channel network connections for vVols.

Answer

It performs data reduction services for all virtual volumes on the array.

Question 10

True or False: In a Dell Unity XT hybrid array, FAST VP (Fully Automated Storage Tiering for Virtual Pools) automatically migrates data at a LUN or file system level between different drive tiers.

Accepted Answer