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If your GPUs are yawning while your training loop “waits for data,” you likely have a storage problem, not a compute problem. AI workloads can hammer disks with small, random reads, high metadata churn, and parallel access patterns that ordinary defaults don’t handle well. The result: iowait spikes, low GPU utilization, and blown training schedules. This guide gives you a practical, Bash-centered checklist to find and fix AI storage bottlenecks on Linux. You’ll get a baseline-measurement script, actionable tuning steps, and real-world examples—all with commands you can paste into your terminal. Many small files: Image datasets often contain millions of tiny files, thrashing metadata and caches.