Dell EMC D-PWF-DS-23 Exam Questions

The default value of paths per volume when adding an NVMe host to a PowerFlex system is 8. This setting is relevant for the configuration of multipathing, which is a method used to provide redundancy and increase availability for storage environments. When you add an NVMe host, the system allows up to 8 paths per volume to be configured by default. This is particularly important in VMware ESXi environments, where multipathing can be configured to handle failover and load balancing of storage traffic.

The reference for this information is found in the Dell PowerFlex specification sheet, which outlines the maximum paths in the multipathing driver per volume as 8 for ESXi 7.0u31. This document provides detailed specifications and configurations for the PowerFlex system, ensuring that the information is aligned with Dell's official documentation and design guidelines for PowerFlex systems.

The maximum number of Storage Data Servers (SDSs) per protection domain in a PowerFlex rack is 1283. This is specified in the PowerFlex specification sheet and ensures that each protection domain can provide data protection for a significant number of SDSs, allowing for scalability and resilience within the PowerFlex infrastructure.

Placing an SDS into Protected Maintenance Mode (PMM) can fail due to several scenarios, two of which are:

Another node in the same protection domain is in maintenance mode: PMM is designed to ensure data protection and availability during maintenance activities. If another node within the same protection domain is already in maintenance mode, initiating PMM on an additional node could compromise the protection domain's ability to maintain data availability and redundancy1.

Another node has failed in the same protection domain: The failure of a node within the same protection domain can prevent the initiation of PMM for another node. This is because the system needs to ensure that there is sufficient redundancy and that data protection is not jeopardized by having multiple nodes in a non-operational state within the same protection domain1.

These scenarios are based on the operational principles of PowerFlex's maintenance modes, as described in the Dell PowerFlex documentation. The system's priority is to maintain data protection and availability, and therefore, it restricts the ability to enter PMM under conditions that could threaten these objectives1.

Secure snapshots in PowerFlex are controlled by policies that define their retention and expiration periods. If a snapshot has a lock enabled, it cannot be deleted until the lock is disabled. The lock is a security feature that prevents accidental or unauthorized deletion of the snapshot before its intended retention period1.

To delete a secure snapshot that is still within its expiration period but needs to be removed, the administrator must first disable the snapshot policy lock. Here are the general steps to do so:

Access PowerFlex Manager.

Navigate to the Snapshots section.

Locate the specific snapshot that needs to be deleted.

Disable the lock on the snapshot policy associated with the snapshot.

Once the lock is disabled, the snapshot can be deleted manually.

Changing the snapshot expiration period to 30 days (Option C) would not affect the ability to delete the snapshot if the lock is still enabled. The Dual Signature Policy agreement with Dell (Option A) is not a standard procedure for deleting snapshots within PowerFlex and is not related to the administrative controls of snapshot policies.

Therefore, the correct answer is B. Disable the snapshot policy lock on the snapshot, as this action will allow the administrator to delete the snapshot before the expiration period, provided that the snapshot is no longer needed and can be safely removed from the system1.

FSN, or File Storage Network, is the component within the PowerFlex software suite that enables data availability over NAS (Network Attached Storage).It is designed to integrate file services into the PowerFlex system, allowing for the management of file shares alongside block storage within the same infrastructure1.

The FSN component provides the necessary functionality to create, manage, and serve file systems over the network, making it possible for clients to access shared files and directories as if they were local.This integration simplifies the storage architecture and provides a unified storage solution for both block and file data requirements1.

The other options listed, such as SDR (Storage Data Replicator), LIA (Log Integration Adapter), and SDT (Software-Defined Technology), do not specifically relate to the provision of NAS services within the PowerFlex environment. Therefore, the correct answer is A. FSN, as it is the PowerFlex software component responsible for enabling NAS capabilities within the cluster.