After production has been running on the R2 side, the quickest way to give the primary-site hosts immediate access to their original R1 devices is the SRDF resume operation. resume instantaneously returns the devices to their normal R1 personality and re-enables host read/write I/O to them while marking the corresponding tracks on the remote R2 side as invalid. Replication then recommences in the normal R1 → R2 direction; no copy-back of R2 data is required beforehand, so the hosts do not have to wait for any data transfer to complete.

A. Update – Copies all invalid tracks from R2 back to R1; hosts cannot access R1 until the copy finishes.

B. Fallback – Run only after update completes; still requires the full R2 → R1 transfer first.

C. Failover – Makes R2 read/write and R1 write-disabled; moves production away from, not back to, the primary site.

1. Dell EMC Solutions Enabler SRDF CLI Product Guide v9.1

“Recovery procedures – Option 2: Return production without copying back

” pp. 166-168 (resume description).

2. Dell EMC PowerMax & VMAX All Flash SRDF Best Practices TechBook

Doc ID H17614.5

§7.3 “resume – rapid restoration of R1 access.”

3. Dell EMC PowerMaxOS 10 SRDF Concepts & Operations

White Paper

§5.4

p. 54 “resume: re-establishes R1/R2 relationship; host I/O resumes immediately on R1.”

Solutions Enabler (SE) 10.x introduced a new default output mode (v10x) to support the architecture of newer PowerMax 2500/8500 arrays. For older systems like the PowerMax 2000, some detailed fields, including the number of "Cores" assigned to front-end emulations, are displayed in the legacy format. To view this information, the administrator must explicitly invoke the backward compatibility mode by using the -mode v9x argument. This instructs SE 10 to render the output in the same format as SE 9.x, which is appropriate for the PowerMax 2000 hardware.

B. The fundamental issue is a change in the command's output structure and default behavior in SE 10, not a simple rebranding of terminology.

C. The -sid argument is used to target a specific storage array for the command, but it does not influence or alter the output format.

D. The symcfg list command is the correct utility for querying and displaying hardware configuration. symconfigure is used for making and managing configuration changes.

1. Dell Solutions Enabler 10.0.0 CLI Command Reference Guide

Page 802

symcfg list command options. The guide explicitly defines the -mode argument: "Specifies the output mode. The valid values are v9x and v10x. The default is v10x." This confirms the existence of a compatibility mode for SE 9.x output.

2. Dell Solutions Enabler 10.0.0 Release Notes

Page 7

"New commands

options

and daemons". The notes detail enhancements to symcfg list -dir for PowerMax 2500/8500

which implies a different

newer output format that is now the default

necessitating the use of a compatibility mode for older systems.

The storsrvd daemon is the core Dell EMC Solutions Enabler server process. Its primary function is to run on a management host and listen on a designated TCP/IP port for incoming connections from SYMAPI clients. These clients can be local or remote symcli commands or any application built using the SYMAPI library. Once a session is established, storsrvd receives, authenticates, and processes these management requests, forwarding them to the appropriate PowerMax/VMAX storage array for execution. It acts as the central service broker for all SYMAPI-based storage management activities.

A. This describes a high-level management task performed by SYMAPI commands (e.g., symcg, symdg), which use the storsrvd daemon, but it is not the daemon's fundamental function.

B. The daemon uses gatekeeper devices for in-band communication with the array, but it does not perform the management of the gatekeepers themselves.

C. This describes a function of SRDF (Symmetrix Remote Data Facility) technology. The storsrvd daemon is used to issue commands that manage replication, but it does not provide the consistency mechanism.

1. Dell EMC Solutions Enabler Version 9.2 Installation Guide

Page 21

"Solutions Enabler Daemons": "The storsrvd daemon is the Solutions Enabler server daemon. It listens for incoming SYMAPI client sessions."

2. Dell EMC Solutions Enabler Version 9.2 Command Line Interface User Guide

Page 611

Appendix A "Solutions Enabler Daemons": "The storsrvd daemon is the Solutions Enabler server daemon. It listens for incoming SYMAPI client sessions. The storsrvd daemon is started by the stordaemon startup script."

3. Dell EMC Solutions Enabler Version 9.2 Release Notes

Page 10

"Daemons": "storsrvd: The main Solutions Enabler daemon that listens for SYMAPI client requests."

The exhibit illustrates a Cascaded SRDF topology. In this configuration, data is replicated from a primary site (Site A, R1 device) to a secondary, intermediate site (Site B, R2 device), typically using synchronous replication for zero data loss. The intermediate site then acts as a source, replicating the data onward to a tertiary, remote site (Site C, R11 device), usually with asynchronous replication to accommodate longer distances. This chained, three-site configuration (A→B→C) is the defining characteristic of Cascaded SRDF, providing both local and remote disaster recovery capabilities.

B. SRDF/Star: This topology involves a central primary site replicating data concurrently to multiple, separate secondary sites in a "hub-and-spoke" model, not a chained or sequential one. C. SRDF/Metro: This is an active/active high-availability solution for disaster avoidance over metro distances, where a single virtual volume is presented to hosts from two separate arrays. D. Concurrent SRDF: This configuration allows a single source (R1) device to be the primary for two distinct SRDF pairs, replicating to two different target (R2) devices simultaneously.

1. Dell Technologies PowerMax: SRDF Family Technical Overview (August 2022):

Page 16, Section 3.2.2 "Cascaded SRDF": This section describes and provides a diagram for Cascaded SRDF, stating, "Cascaded SRDF is a three-site disaster recovery solution... The R2 device at the bunker site acts as a synchronous target for the production R1 device and as an asynchronous source device for the remote R2 device." This directly matches the topology shown in the exhibit.

Page 17, Section 3.2.3 "SRDF/Star": Describes SRDF/Star as a "hub and spoke" configuration where a primary site replicates to multiple remote sites.

Page 15, Section 3.2.1 "Concurrent SRDF": Explains that with Concurrent SRDF, "an R1 device can be a source for two separate SRDF pairs."

2. Dell EMC SRDF/Metro Overview and Best Practices Technical White Paper (April 2021):

Page 6, Section "What is SRDF/Metro": Defines SRDF/Metro as an active/active configuration that "allows for host access to the SRDF R1 and R2 devices simultaneously," which is fundamentally different from the A→B→C disaster recovery model shown.

To configure Host Flags, the administrator must follow the hierarchical workflow of the Unisphere interface:

1. Context: First, the specific storage array must be selected from the system dashboard or selector to ensure the configuration applies to the correct appliance.
2. Navigation: Next, the user accesses the host management view by selecting Hosts from the main menu, followed by the Hosts object/option within that category.
3. Action: The Create button is clicked to launch the "Create Host" wizard.
4. Configuration: Finally, within the wizard (typically in the Initiator or Attributes step), the user clicks the Set Host Flags button. This opens the settings to override default port flags (e.g., enabling SC3 or SPC2 bits) required for the host's operating system.

Dell EMC Unisphere for VMAX / PowerMax Product Guide

Refer to the section "Managing Hosts" or "Create a Host". The documentation outlines the procedure of selecting the system, navigating to the Hosts view, and using the Create wizard where specific Host Flags can be applied for OS interoperability.

Dell EMC PowerMax Family Product Guide (PowerMaxOS)

Section: "Open Systems-specific provisioning". This section details the requirement of setting host flags for different operating systems and the use of Unisphere to apply them during host creation.

Dell EMC Host Connectivity Guides (e.g., for Solaris or Linux)

These guides consistently reference the need to "Set Host Flags" via the Unisphere GUI when provisioning storage for specific operating systems.

The correct sequence follows the standard lifecycle of a storage migration project. The process begins with preparation, which involves setting up the migration environment (e.g., zoning, connectivity) and then creating the specific migration session where source storage is discovered and target storage is provisioned. The execution phase follows, where data is synchronized in the background, followed by a non-disruptive cutover that redirects host I/O to the new array. Once the cutover is complete and validated, the migration is finalized by committing the changes, which makes the move permanent. Finally, the cleanup phase involves removing the now-redundant migration infrastructure.

Dell PowerMax: Migration Technologies (White Paper): This document outlines the process for Non-Disruptive Migration (NDM). The workflow described follows the sequence of:

Setup: Creating a migration session in Unisphere.

Execution: Involves multiple states such as Synchronized, and then a user-initiated Cutover.

Commit: A final Commit operation is performed to complete the migration and sever the relationship with the source.

Cleanup: Deleting the migration session. This validates the logical flow from setup to cleanup. (Reference Section: NDM operations)

Unisphere for PowerMax Online Help Documentation: The built-in help for the Unisphere management software details the step-by-step wizard for performing an NDM. The wizard guides the user through environment setup, device selection (discovery and provisioning), initiating the synchronization/cutover, and finally committing or aborting the session. The final step outside the wizard is always to decommission the old paths and connectivity.

The correct sequence outlines the logical workflow within the Unisphere for PowerMax GUI to create a secure snapshot of a storage group. The process begins by navigating to the specific storage group that needs protection. The "Protect" action initiates a wizard, where the user first selects the snapshot technology (SnapVX). Subsequently, the user configures the snapshot's basic and advanced settings, such as enabling Secure Snaps. The final step in any wizard-driven process is to review the summary of selected options and then execute the job either immediately or by scheduling it.

Dell Unisphere for PowerMax Online Help Documentation: The procedure for creating a storage group snapshot is detailed within the product's official help files. The steps consistently follow the sequence of selecting the storage group, launching the Protect Data wizard, choosing SnapVX as the technology, configuring snapshot options (including secure snaps in the advanced section), and finally, reviewing and running the job. This directly validates the ordered steps.

Dell PowerMax and VMAX All Flash: TimeFinder SnapVX Local Replication (White Paper): This document describes the capabilities and operations of SnapVX. While not a step-by-step GUI guide, it explains the concepts underlying the wizard's options. For instance, it details the creation of snapshots for a storage group and the "secure snaps" feature, confirming that enabling this is a configuration option within the snapshot creation process. This supports the placement of the "Enable Secure Snaps" step after initiating the snapshot configuration.

The simulator shows the migration session in the Ready to Cutover state. This indicates that the initial data synchronization from the source system to the PowerStore is complete, but the final step to make the PowerStore volumes active for host I/O has not been performed. To "remove the migration environment" as requested, the administrator must first execute the Cutover action. This finalizes the migration process. Once the cutover is complete, the Delete action must be used to remove the now-inactive migration session and clean up all associated resources from the PowerStore Manager interface.

1. Dell PowerStore: Importing External Storage to PowerStore Guide (PowerStoreOS 3.0). This document outlines the required workflow.

Section: "Cut over to PowerStore": This section details the procedure for initiating the cutover from the PowerStore Manager UI once a session reaches the Ready to Cutover state. It explicitly states to select the session

click MORE ACTIONS

and then select Cutover.

Section: "Clean up the migration": This section describes the final step after a successful cutover. It instructs the user to select the completed session

click MORE ACTIONS

and then select Delete to remove the import session from the system.

2. Dell PowerStore: Command Line Interface Reference Guide (PowerStoreOS 3.0). The CLI command structure corroborates the multi-step GUI process.

Section: "import-session": This section details the commands for managing import sessions. The workflow requires executing import-session -id cutover first. Only after a successful cutover can the import-session -id delete command be used to remove the session

confirming that cutover is a prerequisite for deletion.

The scenario requires modifying an existing storage group to add three new volumes and change its Service Level. The provided image displays the final "Summary" screen of the "Modify Storage Group" wizard within Unisphere for PowerMax. This screen appears after the administrator has configured all the required changes: increasing the volume count from two to five (adding three new 100 GB volumes) and changing the Service Level from Gold to Platinum. To commit these changes and have the system execute the provisioning task, the final step is to click the "Run Now" button. This action submits the job to the PowerMax array.

1. Dell Technologies. (2022). Dell Unisphere for PowerMax 10.0.0 Product Guide. Page 101, Section: "Modify a storage group". The guide details the workflow, stating, "On the Summary page, review the summary of the changes. Click Run Now to submit the job."

2. Dell EMC. (2019). Dell EMC PowerMax and VMAX All Flash: Time-Saving Management with Unisphere for PowerMax. White Paper. Page 11, Section: "Provisioning to a host". This document describes the streamlined provisioning workflow, which concludes with a summary screen where the user confirms the operations and initiates the job, consistent with clicking "Run Now".

The "Provision Storage" wizard in Unisphere for PowerMax is the standard, automated method for provisioning storage to a host. This process correctly follows the requirements by creating a single 2 TB volume and placing it in a new storage group named ESXi1SG. It then creates a new port group with the specified director ports. Finally, the wizard automatically creates a masking view, which is the essential construct that links the storage group (what), the initiator group (who), and the port group (where) to grant the ESXi1 host access to the newly created volume.

1. Dell Unisphere for PowerMax 10.0.0.x Product Guide: The procedure is detailed in the "Provisioning" chapter, under the section "Provision storage to a host." The wizard guides the user through selecting the host, creating a storage group, creating volumes, and creating a port group to form a masking view. (See Chapter 4: Provisioning > Provisioning workflows).

2. Dell PowerMax Family Configuration Guide: This guide explains the core concepts of PowerMax provisioning. It defines a Masking View as an object that "controls access to storage by associating a storage group, a port group, and an initiator group." This confirms that the wizard's action of creating a masking view is the correct mechanism for providing the host with access to the provisioned storage. (See Chapter 2: PowerMax fundamentals > Host connectivity > Masking views).