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EMC D-PVM-OE-01 Exam Syllabus Topics:
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NEW QUESTION # 46
A PowerMax systems administrator has created three storage groups with the diamond, gold, and silver service levels. How does the system ensure the service level response times are met during heavy workloads?
- A. By throttling the host front-end IOs
- B. By allocating more device cache slots to Diamond
- C. Service levels are identical on All Flash systems
- D. By throttling the back-end IOs
Answer: A
NEW QUESTION # 47
What takes place during an SRDF Restore operation?
- A. Changes made to the R1 are propagated to the R2. Changes made to the R2 are discarded
- B. Enables access to both the R1 and R2 devices for their hosts
- C. Resumes normal SRDF mirroring and host access
- D. Changes made to the R2 are propagated to the R1 Changes made to the R1 are discarded
Answer: A
Explanation:
Step by Step Comprehensive Detailed Explanation:
In SRDF (Symmetrix Remote Data Facility), a "Restore" operation is used to resynchronize the source (R1) and target (R2) devices after a situation where the target device might have been modifiedindependently. This typically occurs after a failover scenario where the target device becomes the primary and undergoes changes.
During an SRDF Restore operation:
* R2 Changes Discarded:Any changes made to the target (R2) device since the last synchronization are discarded.
* R1 Changes Propagated:The current data on the source (R1) device is copied over to the target (R2), overwriting any existing data on the target.
This effectively restores the target device to a state consistent with the source device, ensuring data integrity and consistency.
Why other options are incorrect:
* B. Resumes normal SRDF mirroring and host access:While a Restore operation can be part of the failback process, it's not the only step involved. Failback might involve additional actions like reversing replication direction and restoring host access.
* C. Changes made to the R2 are propagated to the R1. Changes made to the R1 are discarded:This describes an "Update" operation, not a "Restore."
* D. Enables access to both the R1 and R2 devices for their hosts:This describes a "Split" operation, where both devices are made accessible independently.
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 commands and operations, including the symrdf restore command. 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
"Restore" operation.
NEW QUESTION # 48
What is the default port number to access the Dell EMC vApp Manager for Solutions Enabler?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 49
A TimeFinder SnapVX snapshot of a Storage Group was created with a time-to-live setting of seven days Fourteen days after snapshot creation, a query shows that the snapshot still exists What is a possible reason for this issue?
- A. Snapshot was not manually terminated
- B. Snapshot has one or more linked targets
- C. Snapshot was created in NoCopy mode
- D. D. Reserved Capacity limit was exceeded
Answer: B
Explanation:
Step by Step Comprehensive Detailed Explanation:
TimeFinder SnapVX snapshots in PowerMax can be configured with a time-to-live (TTL) setting. This setting automatically deletes the snapshot after the specified time period has elapsed. However, there are certain situations where a snapshot might persist beyond its TTL:
* Linked Targets:If a snapshot has one or more linked targets associated with it, the snapshot will not be automatically deleted even if the TTL expires. This is because the linked targets depend on the snapshot for their data. The snapshot will remain available until all linked targets are deleted or unlinked.
Why other options are incorrect:
* B. Snapshot was not manually terminated:The TTL setting is designed to automatically delete the snapshot; manual termination is not required.
* C. Snapshot was created in NoCopy mode:The NoCopy mode affects how the snapshot is initially created, not its TTL behavior.
* D. Reserved Capacity limit was exceeded:The Reserved Capacity limit applies to the overall storage space used by snapshots, not the TTL of individual snapshots.
References and documents of Dell's public documentation for PowerMax Operate v.2:
* Dell Solutions Enabler 10.0.0 TimeFinder SnapVX CLI User Guide:This guide provides detailed information about SnapVX features and functionalities, including the time-to-live setting and how it interacts with linked targets. You can find this document on the Dell Support website by searching for
"Solutions Enabler TimeFinder SnapVX CLI User Guide."
NEW QUESTION # 50
When setting Host I/O Limits on a Storage Group, what are the available dynamic I/O distribution modes?
- A. Balanced Always, and OnFailure
- B. Never, OnFailure. and Always
- C. Balanced, OnFailure. and Never
- D. Never, Balanced, and Always
Answer: B
Explanation:
Mode can be Never, OnFailure, or Always Never: Implies static even distribution (default) OnFailure: On a failure, I/O limits are redistributed to online ports Always: I/O limits are dynamically distributed based on demand
NEW QUESTION # 51
Which units of measure are used to specify the size type when creating volumes in Unisphere?
- A. Cylinders, GB, TB. PB
- B. Cylinders, MB, GB, TB
- C. MB, TB, PB
- D. MB and GB only
Answer: A
NEW QUESTION # 52
On a PowerMax or VMAX Family array, what is the default Dynamic I/O distribution mode setting when a Storage Group is associated with Host I/O Limits?
- A. On Failure
- B. Balanced
- C. Always
- D. Never
Answer: D
NEW QUESTION # 53
A systems administrator plans to use Non-Disruptive Migration (NDM) to migrate data from a VMAX array running Enginuity 5876 to a PowerMax running PowerMaxOS 5978 Which NDM mode will be used?
- A. Metro-based
- B. Pass-through
- C. Adaptive Copy
- D. Asynchronous
Answer: B
NEW QUESTION # 54
A production PowerMax array has been configured to replicate to a disaster recovery (DR) array using SRDF Adaptive Copy mode. There are occasional bandwidth constraints on the network connecting the two arrays.
These bandwidth constraints prevent the immediate replication of production data.
Where does the new production data accumulate until it can be replicated to the array at the DR site?
- A. Local array cache
- B. Local journal volumes
- C. R2 device
- D. R1 device
Answer: A
NEW QUESTION # 55
What is the performance metric for the read-to-write ratio of workloads on a specific logical block address?
- A. Workload clustering
- B. Prefetch
- C. Workload type
- D. Data spanning
Answer: C
NEW QUESTION # 56
When using TimeFinder SnapVX, why would a redirection-write be changed to a copy-on-write?
- A. Improve wear rates on flash disks
- B. Back-end utilization exceeds 80%
- C. Snapshot delta has used 80% of the SRP
- D. Prevent a new write from being demoted to a lower tier
Answer: D
Explanation:
https://infohub.delltechnologies.com/en-US/l/dell-emc-powermax-and-vmax-all-flash-timefinder-snapvx-local-replication-1/redirect-on-write/
NEW QUESTION # 57
What are the Compliance levels for Storage Groups in Unisphere for PowerMax?
- A. Fatal, Critical, Warning, and No Status
- B. Fatal, Critical, Stable, and No Status
- C. Critical, Marginal, Stable, and No Status
- D. Critical, Marginal, Warning, and No Status
Answer: C
NEW QUESTION # 58
What would the RDF device and Link states be after an SRDF Update operation?
- A. R1=WD Link=NR R2=RW
- B. R1=RW Link=RW; R2=WD
- C. R1=WD Link=RW. R2=RW
- D. R1=RW Link=NR. R2=RW
Answer: A
NEW QUESTION # 59
Exhibit.
Which activity needs to be performed prior to the operations shown in the exhibit?
- A. TTL setting should be changed
- B. Target volumes should be unmapped
- C. Target volumes should be unmounted
- D. Snapshot should be terminated
Answer: C
NEW QUESTION # 60
Where are the Host l/Os directed to when the Storage Group is in a Non-Disruptive Migration CutoverReady state?
- A. Source array only
- B. Held in host cache
- C. Source and target arrays
- D. Target array only
Answer: A
NEW QUESTION # 61
Place the steps to set Host Flags using the Create Host wizard in the correct order
Answer:
Explanation:
Explanation:
Here's the correct sequence of actions, along with explanations:
Correct Order:
* Select the Hosts > Hosts menu option.
* Why:This is the initial navigation step within Unisphere. You need to go to the "Hosts" section where you can manage and configure host connections to the PowerMax array.
* Navigate to the storage array to be configured.
* Why:In an environment with multiple PowerMax arrays, you need to select the specific array for which you want to configure host settings.
* Click the Create button.
* Why:This initiates the "Create Host" wizard, which will guide you through the process of adding a new host and configuring its settings, including the host flags.
* Click the Set Host Flags button to override or enable any port flag settings.
* Why:Within the Create Host wizard, you'll reach a point where you can configure host flags.
Clicking the "Set Host Flags" button allows you to modify these flags.
* Host Flags:These flags are settings that define how the PowerMax array interacts with the host.
They control things like:
* SCSI support:Different variations of SCSI protocols.
* High availability:Features like auto-negotiation of failover.
* Other host-specific behaviors.
* Select the Hosts > Hosts menu option.
* Navigate to the storage array to be configured.
* Click the Create button.
* Click the Set Host Flags button to override or enable any port flag settings.
NEW QUESTION # 62
What takes place during an SRDF Establish operation?
- A. Enables access to both the R1 and R2 devices on the hosts
- B. Changes made to the R1 are propagated to the R2. Changes made to the R2 are discarded
- C. Changes made to the R2 are propagated to the R1 Changes made to the R1 are discarded.
- D. Resumes normal SRDF mirroring and host access
Answer: B
NEW QUESTION # 63
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