The Pure1 Snapshot Policies simulator, also known as SafeMode, requires historical data to provide meaningful projections. It analyzes the change rate and data patterns of existing snapshots on a volume or protection group. This historical information is used to model the capacity impact of new or modified snapshot frequencies and retention schedules. Without a history of existing snapshots, the simulator has no baseline data on which to base its calculations, rendering the feature unusable for that specific volume.

B. When a FlashArray does not have existing snapshots: The simulation cannot function without historical data, which is derived from existing snapshots to calculate change rates and predict future space usage.

C. When a FlashArray has an existing saved workload simulation: A workload simulation models performance based on I/O patterns, which is distinct from a snapshot policy simulation that models capacity based on data change rates.

1. Pure Storage. (n.d.). Pure1 Capacity Planning for FlashArray. Pure Storage Documentation. [This documentation explains that capacity forecasting and planning tools leverage historical usage data, which includes snapshot history.]

2. Pure Storage Support. (n.d.). Pure1: Snapshot Catalog and Policy Recommendations. Pure Storage Knowledge Base. [This article details that the recommendation engine analyzes existing local snapshots to simulate the effects of different policies.]