ComfyUI randomly hitting 100% disk usage and getting stuck
im running ComfyUI on Windows with an RTX 5060 Ti 16GB VRAM and 32GB RAM , and I’m hitting something really weird that I can’t fully explain and i need your thoughts and a proper solution if it exists
i have a desktop pc mainly to run comfyui workflows i do not run or use any other parallel processes.
my main workflows are here for anyone who wants to look more in depth https://drive.google.com/drive/folders/1HOYySChU4y-BspIlJGB6uWKwoyYCBhs7?usp=sharing
z image turbo (ZIT)
wan video generation (replace)
my problem is that when running those workflows in the same conditions for example currently 0% cpu, 19%ram, 0%gpu, 0%disk
the wan workflows sometimes runs relatively fast and load all models fast when generating of 70frames of 720*1280 video the generation time take about 10minutes reducing the resolution to 480*832 didn't solve the problem in this case the disk usage dosen't even go beyond 40% but it's the ram and gpu that are almost at their full capacity but not getting stuck and other times i just get to 100% disk usage and the workflow just gets stuck way before even starting to generate the video sometimes gets to a 100% disk in the pose extraction node and i'm not talking that i have the problem after successive runs,im talking about first time run after starting the pc and starting comfyui.
the same with ZIT sometimes it loads so fast and generates 1920x1440 images at 8 steps within 20s max other times the workflow does not load at all and the disk is at 100% while all the other hardware are in their normal usage.
anyone faced this problem?i'll answer all your questions and i'll really appreciate any help
thank you in advance.
Posted May 28, 2026, 10:41 AM UTC