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EMC Dell VPLEX Operate Achievement Sample Questions (Q38-Q43):

NEW QUESTION # 38
Which command is used to display available statistics for monitoring VPLEX?

A. monitor add-sink
B. monitor create
C. monitor collect
D. monitor stat-list

Answer: D

Explanation:
The command used to display available statistics for monitoring VPLEX is monitor stat-list. This command provides a list of all the statistical counters that are available for monitoring various components and aspects of the VPLEX system.
* Command Function: The monitor stat-list command is part of the VPLEX monitoring suite of commands.It allows administrators to view the different statistics that can be collected and monitored1.
* Usage: When executed, this command will output a list of statistics that are available for collection.These statistics can include performance metrics, system health indicators, and other relevant data points that are useful for monitoring the VPLEX environment1.
* Monitoring Suite: VPLEX provides a comprehensive set of monitoring tools that enable administrators to keep track of system performance and identify potential issues before they impact operations.The monitor stat-list command is a key component of this suite1.
* Other Commands: While the monitor create and monitor add-sink commands are used to set up and direct where statistics should be sent, respectively, and the monitor collect command is used to collect performance data for a specific monitor, the monitor stat-list command is specifically used to list available statistics1.
By using the monitor stat-list command, VPLEX administrators can effectively determine which statistics are available for monitoring, helping them to configure their monitoring setup according to the needs of their environment.

NEW QUESTION # 39
In preparing a host to access its storage from VPLEX, what is considered a best practice when zoning?

A. Each host should have at least one path to an A director and at least one path to a B director on each fabric, for a total of four logical paths.
B. Each host should have either one path to an A director or one path to a B director on each fabric, for a minimum of two logical paths.
C. Ports on host HBA should be zoned to either an A director or a B director.
D. Dual fabrics should be merged into a single fabric to ensure all zones are in a singlezoneset.

Answer: A

Explanation:
When preparing a host to access its storage from VPLEX, the best practice for zoning is to ensure that each host has at least one path to an A director and at least one path to a B director on each fabric. This setup provides redundancy and ensures continuous availability of data even if one path or director fails.
* Redundant Paths: By having at least one path to an A director and one path to a B director, the host can maintain access to its storage even if one of the directors or paths becomes unavailable1.
* Fabric Configuration: The use of dual fabrics provides an additional layer of redundancy.Each fabric acts as an independent network, and having paths on both fabrics ensures that the host can still access storage if one fabric experiences issues1.
* Logical Paths: The total of four logical paths (two paths per fabric) allows for load balancing and failover capabilities.This configuration is crucial for environments that require high availability and resilience1.
* Zoning Best Practices: Proper zoning practices are essential for maintaining a secure and efficient storage network.The recommended zoning configuration helps to isolate traffic and prevent disruptions1.
* VPLEX Configuration: In a VPLEX environment, it is important to follow the recommended zoning practices to take full advantage of the system's capabilities for data mobility and continuous availability1.
By following this zoning best practice, administrators can ensure that the host has reliable and resilient access to its storage volumes through the VPLEX system.

NEW QUESTION # 40
VPLEX Metro has been added to an existing HP OpenView network monitoring environment. The VPLEX SNMP agent and other integration information have been added to assist in the implementation. After VPLEX is added to SNMP monitoring, only the remote VPLEX cluster is reporting performance statistics.
What is the cause of this issue?

A. Local VPLEX Witness has a misconfigured SNMP agent.
B. TCP Port 443 is blocked at the local site's firewall.
C. HP OpenView is running SNMP version 2C, which may cause reporting that does not contain the performance statistics.
D. Local VPLEX cluster management server has a misconfigured SNMP agent.

Answer: D

Explanation:
When only the remote VPLEX cluster is reporting performance statistics in an HP OpenView network monitoring environment, the cause is likely due to a misconfiguration of the SNMP agent on the local VPLEX cluster management server. Here's a detailed explanation:
* SNMP Agent Role: The SNMP (Simple Network Management Protocol) agent is responsible for collecting and sending performance statistics from the VPLEX cluster to the monitoring system1.
* Misconfiguration Symptoms: If the SNMP agent is misconfigured on the local VPLEX cluster management server, it may fail to collect or send the correct performance data, resulting in missing statistics in the monitoring system1.
* Troubleshooting Steps: To resolve this issue, the VPLEX administrator should verify the SNMP configuration on the local VPLEX cluster management server.This includes checking the community strings, SNMP version, and target IP addresses for the monitoring system1.
* Correct Configuration: Ensuring that the SNMP agent is correctly configured on the local VPLEX cluster management server will allow it to report performance statistics accurately to the HP OpenView network monitoring environment1.
* Monitoring Continuity: Proper configuration of the SNMP agent is crucial for continuous and comprehensive monitoring of the VPLEX environment, which is essential for maintaining system performance and availability1.
By addressing the misconfiguration of the SNMP agent on the local VPLEX cluster management server, the service provider can restore full monitoring capabilities and ensure that both local and remote VPLEX clusters report performance statistics as expected.

NEW QUESTION # 41
What is the correct order of steps to migrate from an old array to a new one without disruption using VPLEX?

Answer:

Explanation:

The correct order of steps to migrate from an old array to a new one without disruption using VPLEX is:
* VPLEX discovers the new array and the admin creates migration target devices.
* VPLEX admin initiates mobility job(s).
* Once volumes on the new array are fully synchronized, the admin commits the migration.
* VPLEX admin monitors progress of the migration; I/O to host continues.
* Connect new storage array to VPLEX.
* Discovery and Creation: The initial step involves VPLEX identifying the presence of a new storage array within its environment. Following this discovery, a system administrator is responsible for setting up migration target devices on this newly recognized array.
* Initiation of Mobility Jobs: Subsequently, a system administrator must initiate mobility jobs through the VPLEX management interface, which facilitates data movement from the existing source storage to the target devices on the new array.
* Synchronization and Commitment: After initiating mobility jobs, data synchronization between source and target arrays begins automatically. Once synchronization reaches completion, indicating that both arrays have identical data sets, an administrator must commit to finalizing this stage of migration.
* Monitoring Migration Progress: Throughout this process, it's crucial for an administrator to monitor ongoing operations ensuring that input/output operations continue uninterrupted for hosts accessing data during transition phases.
* Connecting New Array: The final step involves integrating the newly populated storage array into production by connecting it with VPLEX systems thus completing migration.

NEW QUESTION # 42
What condition would prevent volume expansion?

A. Metadata volume being backed up
B. Migration occurring on the volume
C. Volume not belonging to a consistency group
D. Logging volume in re-synchronization state

Answer: B

Explanation:
Volume expansion in Dell VPLEX is a process that allows for increasing the size of a virtual volume.
However, certain conditions can prevent this operation from taking place:
* Migration Occurring on the Volume: If there is an ongoing migration process involving the volume, it cannot be expanded until the migration is complete.This is because the volume's data layout is being altered during migration, and any attempt to change its size could lead to data corruption or other issues1.
* Consistency Group Membership: Whether or not a volume belongs to a consistency group does not directly prevent volume expansion. Consistency groups in VPLEX areused to ensure write-order fidelity across multiple volumes but do not restrict the expansion of individual volumes within the group.
* Metadata Volume Backup: Backing up a metadata volume is a separate operation that does not interfere with the ability to expand a storage volume. Metadata backups are typically performed to preserve the configuration and state information of the VPLEX system.
* Logging Volume Re-synchronization: While a logging volume in a re-synchronization state indicates that there is an ongoing process to align data across clusters or devices, it does not inherently prevent the expansion of a storage volume.
Therefore, the condition that would prevent volume expansion is when there is a migration occurring on the volume (OA).

NEW QUESTION # 43
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