How to fix I/O scheduling lag on Seagate FireCuda 540 2TB?
Riding across Eos is a dream until that save icon pops up in the top right; my frame rate would tank from 90 FPS down to 40 FPS instantly, and the stutter was just jarring. I dug into the logs and found the FireCuda 540 had random write response spikes between 12-28ms when handling small files, which basically choked the game engine's sync mechanism. I wasted some time trying to bump up the virtual memory, but while disk usage dropped, the latency stayed exactly the same—a total dead end. I eventually went into Device Manager and switched the disk write caching policy to 'Force Flush,' while simultaneously disabling PCIe Link State Power Management in the BIOS. Running AIDA64, I saw random write latency plummet from 22ms to a steady 7-11ms, and those save-point stutters basically vanished. I did notice a slight bump in idle power draw after killing the power management, which I had to balance out by tweaking my Windows power plan. Temps stayed between 42-50℃ with a very stable load distribution. After exporting a system config snapshot to lock in these settings, my frame times finally stabilized at 5.1-6.4ms.
