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EMC D-PDD-DY-23 Exam Syllabus Topics:
Topic
Details
Topic 1
Topic 2
Topic 3
Topic 4
Topic 5
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EMC Dell PowerProtect Data Domain Deploy 2023 Sample Questions (Q92-Q97):
NEW QUESTION # 92
What is the data reduction ratio that can be predicted when applying best practices for deduplicating data on a PowerProtect DD?
Answer: A
Explanation:
Explanation: The expected data reduction ratio with PowerProtect DD, when following best practices for deduplication, is approximately 50:1. This high deduplication efficiency significantly reduces storage needs, making PowerProtect DD highly cost-effective. When best practices are applied for deduplication on PowerProtect DD systems, a data reduction ratio of 50:1 can typically be achieved. This means that for every
50 units of data, only 1 unit needs to be stored, significantly optimizing storage utilization. Achieving this ratio depends on factors such as data type, backup frequency, and the effectiveness of deduplication processes configured on the system. This high deduplication rate is a key advantage of PowerProtect DD appliances, allowing organizations to manage large volumes of backup data more efficiently.
NEW QUESTION # 93
Task 6
A backup administrator finished installing a PowerProtect DD3300. After the installation, they notice disk 1.5 is offline after running the disk fail command in the DDOS CLI.
Using the simulator, flash an LED on the hard drive with the issue and return it to operation.
When you have finished, continue to the next question.
Answer:
Explanation:
See the solution in the explanation below.
Explanation:
To flash an LED on a hard drive and bring a disk back online using the DD System Manager or DDOS CLI, follow these general steps:
Step 1: Identify the Disk
* In DD System Manager:
* Go to the Hardware section in the sidebar.
* Locate the list of disks, and find Disk 1.5 (the offline disk).
* In DDOS CLI (if using CLI):
* Use the command to list disks and confirm the status of Disk 1.5.
* Command example: disk show state or disk show summary.
Step 2: Flash the LED on the Disk
* In DD System Manager:
* In the Hardware section, select Disk 1.5.
* Look for an option like Flash LED or Locate Drive to help identify the physical disk.
* Activate the LED flash to identify the disk physically.
* In DDOS CLI:
* Use the command: disk locate 1.5 to flash the LED for Disk 1.5.
Step 3: Bring the Disk Back Online
* In DD System Manager:
* After identifying the disk, check for options to Bring Online or Reactivate Disk 1.5.
* Select the option to return the disk to operation.
* In DDOS CLI:
* Use the command: disk unfail 1.5 to bring the disk back online.
Step 4: Verify the Disk Status
* Confirm in DD System Manager or by using the disk show state command in CLI that Disk 1.5 is now online and functioning.
After completing these steps, the LED should flash to help locate the disk physically, and then Disk 1.5 will be returned to an operational state. Let me know if you need further guidance!
A screenshot of a computer Description automatically generated
NEW QUESTION # 94
What are some possible network bottlenecks for a PowerProtect DD?
Answer: A
NEW QUESTION # 95
What is the correct sequence of operations used by the PowerProtect DD DIA in the end-to-end verification process?
Answer:
Explanation:
Explanation:
A screenshot of a computer Description automatically generated
1. Writes request from the backup software
First, the backup software sends a write request to the DD system.
2. Analyzes data for redundancy and stores new data segments
Next, DDOS analyzes the incoming data for redundancy and stores only the unique data segments to optimize storage.
3. Stores the fingerprints
After deduplication, the system stores the unique fingerprints of the data.
4. Verifies that the checksum that is read back matches the checksum that is written to the disk This step involves verifying the data integrity by matching the written checksum with the read checksum.
5. Verifies that DDOS can read data from the disk
Finally, the system verifies that the data can be read back correctly from the disk, ensuring the write was successful.
NEW QUESTION # 96
An administrator is migrating their old cloud tier-enabled Data Domain to a new PowerProtect DD appliance with cloud tier. During migration, the administrator recognizes that file system cleaning on the source system is not possible. What is the most likely cause of this behavior?
Answer: A
Explanation:
Explanation: When a source system is in restricted mode, certain maintenance tasks, like file system cleaning, are unavailable. This restriction is typically applied during migrations to prevent data inconsistencies, ensuring a smooth transfer of data to the new system.
During the migration process from an older Data Domain system with cloud tier capabilities to a new PowerProtect DD appliance, the source system operates in a "restricted mode." This restricted mode limits specific functionalities, including file system cleaning. File system cleaning is a maintenance operation that reclaims storage by deduplication and cleaning up obsolete data. However, to prevent data inconsistency or interference during migration, this functionality is temporarily disabled on the source system, thus ensuring data integrity until the migration process is completed.
The restricted mode ensures that all critical operations remain stable and predictable on the source system, which is essential for a smooth migration to the new environment.
NEW QUESTION # 97
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