EMC Updated D-MSS-DS-23 Exam Questions and Answers by ivo

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Within Dell Unity XT storage systems, thin clones are a powerful feature that allows you to create space-efficient copies of a base LUN (Logical Unit Number) without duplicating all of the data, saving significant storage space.

Themaximum number of thin clones per base LUN in Dell Unity XTis16. This limit is documented in the official Dell Unity XT documentation:

According to theDell EMC Unity: Best Practices Guide (Dell Unity OE 5.x)and theDell Unity XT Administrator’s Guide, a base LUN can have up to 16 thin clones.

These thin clones share the same data blocks as the base LUN initially and only consume additional space as they diverge (copy-on-write).

The reason for this limitation is to balance performance and manageability, as thin clones rely on the snapshot engine and copy-on-write technology, which can impact performance if too many clones are active simultaneously.

Key Points:

✅Thin clones are ideal for environments requiring multiple space-efficient copies (e.g., for testing, development, or backup scenarios).

✅They leverage snapshot technology under the hood.

✅16 clones per base LUN strikes a balance between flexibility and system overhead.

The minimum number of drives in a RAID 5 dynamic pool is 5. RAID 5 requires at least 3 drives for data striping with parity, but Dell's implementation in Unity systems requires a minimum of 5 drives to ensure optimal performance and reliability.

The commandsupportshowis used to gather comprehensive data from Brocade switches. This command collects extensive diagnostic information about the switch, including configuration details, hardware status, and various operational statistics. Here's a step-by-step explanation of thesupportshowcommand:

Access the Brocade Switch:Connect to the Brocade switch via SSH or through a console connection.

Enter the Command:Typesupportshowin the command line interface (CLI) and press Enter.

Data Collection:The command will begin collecting a wide array of information from the switch. This includes:

Hardware and firmware versions

Port status and configurations

Zoning information

Error logs and statistics

Environmental data (temperature, power supply status, etc.)

Output Review:The gathered data is typically extensive and can be used for troubleshooting, performance analysis, and ensuring the switch is operating correctly.

Save the Output:The output can be redirected to a file for later review or analysis by technical support teams.