Solving WD SN850 2TB storage write issues in Crimson Desert
During long exploration sessions, I noticed these tiny 0.4-second freezes that were incredibly jarring, especially when moving fast through the world. It turns out when the SN850 has less than 15% free space, the cache reclamation kicks in and causes an I/O block, sending latency from 1ms up to 40-55ms. I tried disabling the write cache in Windows to see if it would stabilize, but that just tripled my save times—a cautious move that completely backfired. I ended up nuking 300GB of junk files, ran a trim, and re-enabled high-performance write mode in the device manager. AS SSD benchmarks showed write speeds climbing from 1100MB/s back up to 3200-3500MB/s, and the save-game hitches are gone. There was a bit of a lag spike for the first ten minutes while the file index rebuilt, but then it smoothed out. Drive temps are stable at 42-50℃, and random writes are now consistently hitting 3200-3500MB/s.
