The visibility-interval is a parameter within a SnapMirror Synchronous (SM-S) policy that controls the creation of common Snapshot copies. These snapshots make the synchronously replicated data consistent and "visible" on the destination volume. The valid range for this interval is 30 seconds to 10 minutes. However, the default value for the visibility-interval is 2 minutes. Therefore, the statement that the default value is 5 minutes is incorrect.

A: This statement is correct. The interval's purpose is to create a common Snapshot copy, which makes the data visible and consistent on the destination.

B: This statement is correct. The interval directly controls the timer for the automatic creation of a common Snapshot copy on the source and destination volumes.

D: This statement is correct. The minimum configurable value for the visibility-interval is 30 seconds, as specified in the official ONTAP documentation.

1. NetApp ONTAP 9 Command Reference: In the snapmirror policy create command documentation

the -visibility-interval parameter is described. It states

"The default setting is 2 minutes. The range is 30 seconds to 10 minutes."

Source: NetApp ONTAP 9.8 Commands: Manual Page Reference

snapmirror policy create section.

2. NetApp ONTAP Data Protection Concepts: The documentation explaining SnapMirror Synchronous replication details the role of the visibility interval. It clarifies that this interval determines "the amount of time after which a common Snapshot copy is automatically created on the source and destination volumes

" which aligns with options A and B being correct functions of the variable.

Source: NetApp ONTAP 9 Documentation Center

"Data protection overview

" section on "How SnapMirror Synchronous replication works."