Setup: Lenovo laptop (Core i3, 4GB RAM, 256GB SSD) running Arch headless as a file server over 1Gbps ethernet. Problem: During file transfers (FileZilla), any terminal command takes 2-3 seconds to execute. The system feels completely unresponsive in the shell while transferring files. This never happened on Ubuntu/Ubuntu Server with identical hardware and setup. RAM usage is fine (~3.5GB free). What could be causing this I/O blocking? Any Arch-specific configs I should check?