On a Dell Unity XT file system asynchronous replication session, how many system Snapshots are required to support replication?

Question

Options

• A1
• B4
• C8
• D2

• A
  2% (1)
• B
  92% (58)
• C
  2% (1)
• D
  5% (3)

Explanation

Option B (4) is correct because Dell Unity XT asynchronous file system replication requires 4 system-managed snapshots to function: 2 on the source side (one marking the last successfully replicated point, one capturing the current sync state) and 2 on the destination side (mirroring the same tracking structure). These snapshots allow the system to calculate the delta between replication cycles and ensure consistency.

Why the distractors are wrong:

• A (1): A single snapshot cannot track both the "last replicated" and "current" states simultaneously - you need at least a pair per side.
• D (2): Two snapshots would only cover one side of the replication pair; the destination also requires its own set to maintain consistency.
• C (8): Eight snapshots is not a system requirement for async replication - that number isn't tied to any standard Unity XT replication architecture.

Memory tip: Think "2+2 = 4" - async replication needs a pair of snapshots on the source (before/after) and a pair on the destination, totaling 4. If you remember that replication has two sides and each side needs two snapshots, you'll always land on B.

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