Dell DES-1D12: What does Dell Unity XT 480F system embedded module provide

Question

A Dell Unity XT 480F system ships with two embedded modules, one for each SP. What does the embedded module provide?

A. Fiber Channel connectivity
B. Field service only
C. CNA connectivity
D. Management

Answer

C. CNA connectivity

Explanation

The correct answer is:

C. A source file resource replicating synchronously from Site A to Site B and replicating synchronously from Site A to Site C

The Dell Unity XT MetroSync replication topology involves a source file resource replicating synchronously from Site A to Site B and replicating synchronously from Site A to Site C.

In this replication topology:

• Synchronous replication means that data is written to both the primary site (Site A) and the secondary site (Site B and Site C) simultaneously. This ensures that data changes are consistently maintained on both sides before acknowledging the write operation to the application. Synchronous replication provides zero data loss (RPO = 0) as both sites are in sync at all times.
• The source file resource refers to the primary storage system or LUN that contains the data to be replicated.
• Site A is the primary site where the data resides, and it serves as the source for the synchronous replication to both Site B and Site C.
• Site B and Site C are secondary sites that act as replication targets. Both sites receive data synchronously from Site A, meaning they have up-to-date copies of the data and can be utilized for disaster recovery or high availability purposes.

The Dell Unity XT MetroSync replication topology is commonly used in scenarios where continuous data availability and zero data loss are critical requirements. It provides a robust and reliable method for keeping multiple sites in sync with minimal data latency and helps ensure business continuity in case of site failures or disasters.

The other options mentioned do not accurately describe the Dell Unity XT MetroSync replication topology:

A. This option describes a replication topology where the source block resource is replicating synchronously to both Site B and Site C. However, it states that Site A is replicating to Site C, which is not accurate. In MetroSync, synchronous replication is always between the source site and the target site.

B. This option describes a replication topology where the source file resource is replicating synchronously to Site B and replicating asynchronously to Site C. However, in MetroSync, both replications are synchronous for data consistency.

D. This option describes a replication topology where the source block resource is replicating synchronously to Site B and replicating asynchronously to Site C. However, in MetroSync, both replications are synchronous for data consistency.

In summary, the correct description of the Dell Unity XT MetroSync replication topology is that a source file resource replicates synchronously from Site A to Site B and replicates synchronously from Site A to Site C.

Reference

• I/O Module Options – 380/F, 480/F, 680/F, 880/F | Dell Unity XT: Introduction to the Platform | Dell Technologies Info Hub
• Support for Dell EMC Unity XT 480F | Documentation | Dell Malaysia
• Dell Unity XT 480F | Dell USA

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