How to fix the I/O blocking on Fanxiang S790 4TB in Deathloop?
Sprinting through Blackreef is great until those loop loading screens hit and the game just hangs for a second—it's a total buzzkill for anyone chasing a seamless experience. I dug into the telemetry and found the Fanxiang S790 4TB controller was struggling with fragmented assets, with I/O queue depths swinging wildly between 32 - 64, causing random read latency to spike between 15ms - 22ms. At first, I tried killing all background update services in Windows, but that was a complete dead end; it didn't stop the freezes and actually made my boot times feel sluggish. I eventually dove into the Registry to override the disk scheduling algorithm, forcing it from the default balanced mode to a high-performance priority, while simultaneously flashing the latest NVMe drivers. Monitoring via a latency analyzer showed response times plummeting from 18.4ms to a rock-steady 6.2ms - 8.5ms. It wasn't a clean ride, though—the system randomly rebooted twice right after the Registry tweak, and things only stabilized once I flipped the Windows Power Plan to High Performance. Temperatures stayed chill between 42℃ - 50℃ with the heatsink doing its job. Verified the throughput via benchmark software, and the config is finally sticking.
