What is capacity planning in storage?

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Forecasting future storage needs and ensuring the environment has enough capacity and performance is what capacity planning in storage is all about. It means looking ahead at how data and workloads will grow, analyzing usage patterns, peak access times, and service level requirements, and then sizing and provisioning the storage environment accordingly. The goal is to have sufficient space and performance headroom so applications don’t slow down or run out of space as demand increases, while also avoiding overprovisioning and unnecessary costs. This involves choosing appropriate storage tiers, planning for capacity growth over time, and scheduling upgrades or expansions before constraints appear. The other ideas touch on related activities but not the forward-looking, performance-focused aspect of capacity planning: assessing current capacity and upgrade timing is a current-state review; monitoring trends for power optimization targets efficiency rather than future capacity; and allocating storage by department based on budget is about resource distribution rather than predicting and ensuring capacity and performance for future needs.