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Many traditional block storage systems have finite maximums and must be replaced with a larger or newer system when the maximum performance or capacity is reached. In contrast, a OneFS powered cluster can linearly expand, or “scale-out” its performance, capacity, or both, seamlessly increasing the existing file system or volume into petabytes of capacity. Also, with the flexibility of OneFS and OneFS SmartPools software, different node types can be mixed in a single cluster or pool. The automated tiered storage capability of SmartPools provides added flexibility and eliminates the need for “forklift” upgrades when different capacity or performance levels are needed.