Dell EMC Dell PowerMax Operate v.2 D-PVM-OE-01 Exam Questions

Answer : A

Step by Step Comprehensive Detailed

The topology shown in the exhibit depicts Cascaded SRDF. This SRDF configuration involves three storage arrays (or sites) connected in a chained or cascaded manner.

Here's how it works:

Primary Site (R1): The production host is connected to the primary storage array (R1).

Intermediate Site (R2): The primary array (R1) synchronously replicates data to an intermediate array (R2).

Remote Site (R2): The intermediate array (R2) then asynchronously replicates data to a remote array (also labeled R2 in the diagram).

This cascading setup provides a multi-hop disaster recovery solution, where data is first replicated synchronously to a nearby site for high availability and then asynchronously replicated to a further remote site for disaster recovery.

Why other options are incorrect:

B . SRDF/Star: SRDF/Star involves a central array replicating to multiple remote arrays in a star-like pattern.

C . SRDF/Metro: SRDF/Metro is designed for synchronous replication over short distances, typically within a metropolitan area.

D . Concurrent SRDF: Concurrent SRDF allows multiple SRDF relationships to exist simultaneously for the same device.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell Solutions Enabler 10.0.0 SRDF Family CLI User Guide: This guide provides detailed information about different SRDF configurations, including Cascaded SRDF. You can find this document on the Dell Support website by searching for 'Solutions Enabler SRDF Family CLI User Guide.'

Dell PowerMax Family: Essentials and Best Practices Guide: This guide offers a comprehensive overview of SRDF and its functionalities, including various topologies and use cases.

Answer : A

Step by Step Comprehensive Detailed

Solutions Enabler (SE) uses various daemons (background processes) to perform different functions. The storstpd daemon is specifically responsible for:

Collecting Performance Statistics: It gathers performance data from the connected storage arrays, such as I/O rates, response times, and other metrics.

Managing Performance Data: It stores and manages the collected performance statistics, making them available for monitoring and analysis through tools like Unisphere for PowerMax.

This data is crucial for understanding the performance of the storage arrays, identifying potential bottlenecks, and optimizing storage resources.

Why other options are incorrect:

B . Coordinates storage array locks and application syscalls: This is the function of the storapid daemon.

C . Starts the system watchdog timer periodically: This is not directly related to the storstpd daemon.

D . Performs remote Solutions Enabler API functions: This is typically handled by the storsrvd daemon.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell Solutions Enabler 10.0.0 CLI User Guide: This guide provides information about the different daemons used by Solutions Enabler and their roles. You can find this document on the Dell Support website by searching for 'Solutions Enabler CLI User Guide.'

Answer : A

Step by Step Comprehensive Detailed

When upgrading Solutions Enabler (SE) on a Linux host, the symcfg discover command plays a crucial role in preparing for the upgrade. Its primary function in this context is to:

Identify the running SE version: Before proceeding with the upgrade, it's essential to know the current version of Solutions Enabler installed on the host. The symcfg discover command gathers information about the existing SE environment, including the version number. This information is used to determine the appropriate upgrade path and ensure compatibility.

Why other options are incorrect:

B . Verifies that the SE daemons have been stopped: While stopping SE daemons is a necessary step before the upgrade, it's not the function of the symcfg discover command.

C . Builds the SYMAPI database: The SYMAPI database is typically built during the initial installation or after a fresh discovery.

D . Creates backups of the configuration directories: Backups are important, but they are usually handled separately as part of the upgrade process, not by the symcfg discover command itself.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell Solutions Enabler 10.0.0 Installation Guide: This guide provides detailed instructions for upgrading Solutions Enabler on different operating systems, including Linux. It explains the steps involved and the role of the symcfg discover command in the upgrade process. You can find this document on the Dell Support website by searching for 'Solutions Enabler Installation Guide.'

Answer : C

Host I/O Limits in PowerMax allow you to control the maximum IOPS (Input/Output Operations Per Second) or bandwidth that a storage group can consume. This helps prevent performance issues caused by one application or workload monopolizing resources.

When you associate Host I/O Limits with a Storage Group, the default Dynamic I/O distribution mode is set to Never.

Never: This means that the I/O limits are statically distributed across the directors in the associated masking view. If a director fails, its allocated portion of the I/O limit is lost. This is the most conservative setting, as it ensures that the I/O limits are strictly enforced even in the event of a director failure.

You can change this setting to Balanced or Always if you need more dynamic distribution of I/O limits.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell PowerMax and VMware vSphere Configuration Guide: This guide provides detailed information about Host I/O Limits, including the different distribution modes and their benefits. You can find this document on the Dell Support website by searching for 'PowerMax and VMware vSphere Configuration Guide.'

Dell Solutions Enabler 10.0.0 CLI User Guide: This guide provides information on how to set Host I/O Limits using SYMCLI commands, including the -dynamic option for specifying the distribution mode.

Answer : D

The storsrvd daemon is a critical component of the Solutions Enabler (SYMCLI) software suite used to manage Dell PowerMax and VMAX storage arrays. Its primary function is to:

Listen for SYMAPI Sessions: It acts as a communication endpoint, listening for incoming SYMAPI sessions from clients or management tools like Unisphere.

Handle Management Requests: When a client connects, storsrvd receives and processes SYMAPI commands and requests, forwarding them to the appropriate components within Solutions Enabler for execution.

Essentially, storsrvd acts as an intermediary between SYMCLI clients and the storage array, facilitating communication and management operations.

Why other options are incorrect:

A . Manages Composite Groups and Device Groups: This is handled by other components within Solutions Enabler.

B . Provides centralized gatekeeper device management: While storsrvd plays a role in device management, it's not the sole component responsible for it.

C . Provides replication consistency protection: This is a function of SRDF (Symmetrix Remote Data Facility) and related components.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell Solutions Enabler 10.0.0 CLI User Guide: This guide provides information about the architecture and components of Solutions Enabler, including the role of the storsrvd daemon in handling SYMAPI communication. You can find this document on the Dell Support website by searching for 'Solutions Enabler CLI User Guide.'

Answer : D

Step by Step Comprehensive Detailed

The PowerMax 8500 is a high-end storage array designed for enterprise environments with demanding capacity requirements. The maximum capacity per array in a PowerMax 8500 is 24 petabytes effective (PBe).

This means that after considering data reduction technologies like deduplication and compression, the array can store up to 24 petabytes of usable data.

Why other options are incorrect:

A . 8 PBe, B. 18 PBe, C. 20 PBe: These values are lower than the actual maximum capacity of the PowerMax 8500.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell PowerMax 8500 Hardware Information Guide: This guide provides detailed technical specifications for the PowerMax 8500, including its maximum capacity. You can find this document on the Dell Support website by searching for 'PowerMax 8500 Hardware Information Guide.'

Dell PowerMax Family: Essentials and Best Practices Guide: This guide offers a general overview of the PowerMax family, including the 8500 model and its key features and capabilities.

Answer : C

Step by Step Comprehensive Detailed

In SRDF (Symmetrix Remote Data Facility), an 'update' operation refers to a specific process where changes made on the target (R2) side are copied back to the source (R1) side. This is typically used in disaster recovery scenarios where:

Failover: A failover occurs, and the target (R2) becomes the active production site.

Data Modification: Data is modified or updated on the target (R2) while it's acting as the primary.

Update Operation: An 'update' is initiated to synchronize the changes from the target (R2) back to the source (R1), ensuring that the source has the latest data.

This process is crucial for maintaining data consistency and ensuring a smooth transition back to the original production site after a failover event.

Why other options are incorrect:

A . process to retain the data on the target R2 side: This is not specific to an 'update' operation. Data retention on the target is a general aspect of SRDF.

B . A process used to return to the original production site after a failover event: While an 'update' is part of the failback process, it's not the entire process itself. Failback involves other steps like reversing replication direction and restoring host access.

D . A process that allows separate hosts to access the same data independently: This describes a different SRDF configuration (like Active/Active) and is not related to the 'update' operation.

Reference and documents of Dell's public documentation for PowerMax Operate v.2:

Dell Solutions Enabler 10.0.0 SRDF Family CLI User Guide: This guide provides detailed information about SRDF commands and operations, including the symrdf update command used to initiate an update from R2 to R1. You can find this document on the Dell Support website by searching for 'Solutions Enabler SRDF Family CLI User Guide.'

Dell PowerMax Family: Essentials and Best Practices Guide: This guide offers a comprehensive overview of SRDF and its functionalities, including disaster recovery scenarios and the use of the 'update' operation.