Pass the EMC Storage Administrator D-PVM-OE-01 Questions and answers with CertsForce

1.write disable R2

2.suspend

3. Merge

4.Resume

5.read/write enable.

Step by Step Comprehensive Detailed Explanation:

In an MDM (Migration for Dell EMC) migration, data is moved from a source array to a target array. When the symdm sync -stop command is issued, it puts the migration into the CutoverNoSync state. This state signifies that:

Synchronization Stopped:Active data synchronization between the source and target arrays has been stopped.

Data on Both Arrays:However, the customer data still resides onboththe source and target arrays. This is because the CutoverNoSync state is a transitional state that allows for a controlled cutover to the target array.

The next step would typically involve a cutover operation, where host access is switched to the target array, and the source array is removed from the migration configuration.

Why other options are incorrect:

A. Only the target array:While the goal is to eventually have the data only on the target, in the CutoverNoSync state, data still exists on both arrays.

B. Only on the source array:Data has already been partially or fully copied to the target array during the migration process.

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

Dell Solutions Enabler 10.0.0 CLI User Guide:This guide provides detailed information about the symdm command and its various options, including the sync -stop command and the CutoverNoSync state. You can find this document on the Dell Support website by searching for "Solutions Enabler CLI User Guide."

Dell PowerMax Family: Essentials and Best Practices Guide:This guide may offer general information about data migration and the different states involved in the process.

Step by Step Comprehensive Detailed Explanation:

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.

References 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."

Step by Step Comprehensive Detailed Explanation:

SRDF/Metro is a high-availability solution that provides synchronous replication between two storage arrays located within a metropolitan distance. It utilizes a witness to prevent data loss in the event of a split-brain scenario (where communication between the arrays is lost).

In SRDF/Metro, there can be onlyoneWitness Group defined between two specific arrays. This Witness Group manages the witness device that acts as a tie-breaker in case of a communication failure between the arrays.

Since the exhibit shows that SRDF/Metro has already been configured between the two arrays using a physical witness, the option to create another SRDF/Metro Witness Group is grayed out because a Witness Group already exists for that pair of arrays.

Why other options are incorrect:

B. SRDF/Metro Witness Groups can only be created with CLI:While CLI can be used, Witness Groups can also be created through Unisphere for PowerMax.

C. The SRDF Group Label needs to be left blank when creating an SRDF/Metro Witness Group:This is not a requirement. Witness Groups can have labels.

References 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/Metro configuration, including the role of the witness and the Witness Group. 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/Metro and its functionalities, including witness configuration and best practices.

Okay, I'm ready to arrange those steps for creating a snapshot in Unisphere for PowerMax in the correct order, based on the image provided.

Here is the correct sequence, along with explanations:

Correct Order:

Select a PowerMax storage system from the navigation pane Storage > Storage Groups.

Why:This is the starting point in Unisphere. You need to navigate to the "Storage Groups" section within the specific PowerMax array where you intend to create the snapshot.

Select a Storage Group and click Protect.

Why:You're choosing the storage group that contains the data you want to snapshot. Clicking "Protect" initiates the process of creating a data protection operation (in this case, a snapshot).

In the Protect Wizard, if not already selected, select Create a Snapshot using SnapVX from the Select Technology tab and click Next.

Why:This specifies that you want to use the SnapVX technology to create a snapshot. SnapVX is the snapshot feature in PowerMax arrays.

In the Configure SnapVX page, select whether to create a snapshot or reuse an existing snapshot along with the expiry type.

Why:Here, you define the core parameters of the snapshot:

Create a new snapshot:This is what you'd typically do for a new point-in-time copy.

Reuse an existing snapshot:In some cases, you might want to update an existing snapshot.

Expiry type:This determines how long the snapshot will be retained (e.g., a specific duration or until manually deleted).

Click Advanced Options to see the advanced options and Enable Secure Snaps.

Why:This allows you to configure more granular settings for the snapshot, including:

Secure Snaps:Enabling this option prevents the snapshot from being deleted before its expiry time, adding an extra layer of protection.

Verify the selections in the summary page, and click Run Now or Add to Job List.

Why:This is the final step before creating the snapshot:

Summary page:Review all the settings you've configured.

Run Now:Immediately creates the snapshot.

Add to Job List:Schedules the snapshot creation for later.

Select a PowerMax storage system from the navigation pane Storage > Storage Groups.

Select a Storage Group and click Protect.

In the Protect Wizard, if not already selected, select Create a Snapshot using SnapVX from the Select Technology tab and click Next.

In the Configure SnapVX page, select whether to create a snapshot or reuse an existing snapshot along with the expiry type.

Click Advanced Options to see the advanced options and Enable Secure Snaps.

Verify the selections in the summary page, and click Run Now or Add to Job List.

Step by Step Comprehensive Detailed Explanation:

Non-Disruptive Migration (NDM) is a feature in PowerMax that allows you to migrate data between storage arrays without any downtime or disruption to host applications. During NDM, SRDF (Symmetrix Remote Data Facility) is used to replicate data between the source and target arrays. Here are the configuration rules that apply to SRDF groups and connections during NDM:

A. The source and target arrays are at most one hop away from the control host:The control host, which manages the NDM process, must have direct connectivity to both the source and target arrays. This ensures efficient communication and control during the migration.

E. DM RDF groups are configured with a minimum of one path:SRDF groups used for NDM (DM RDF groups) must have at least one active path between the source and target arrays. This ensures that data can be replicated continuously during the migration.

Why other options are incorrect:

B. Two DM RDF groups are created per SG migration session:This is not a strict requirement. The number of DM RDF groups may vary depending on the configuration and the specific NDM operation.

C. RF and RE ports are supported, with RF ports being selected if both types are available:While RF and RE ports are supported for SRDF, there's no specific preference for RF ports during NDM. The choice of ports depends on the overall network configuration and availability.

D. A single array cannot have multiple DM RDF groups:An array can have multiple DM RDF groups if needed for different NDM operations or configurations.

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

Dell PowerMax Family: Essentials and Best Practices Guide:This guide provides an overview of NDM and its requirements, including information about SRDF configuration.

Dell Solutions Enabler 10.0.0 CLI User Guide:This guide provides detailed information about SRDF commands and configuration options, which are relevant for NDM operations.