`--disable-dynamic-vram` prevents automatic fast-disk detection on Windows

Title

--disable-dynamic-vram prevents automatic fast-disk detection on Windows

Description

After #16333 added automatic --fast-disk detection, models are reported as:

[INFO] Model storage policy: fast_disk=False paths=['D:\\ComfyUI_windows_portable\\ComfyUI\\models\\diffusion_models\\anima-base-v1.0.safetensors']

even though the model is stored on a PCIe 4.0 x4 NVMe drive that comfy-aimdo correctly detects as a fast disk.

This happens when ComfyUI is started with:

--disable-dynamic-vram

It appears that comfy_aimdo.control.init() is only called when enables_dynamic_vram() is true.

Since comfy_aimdo.storage.fast_disk() depends on the native Aimdo library being initialized, the storage check returns None when Dynamic VRAM is explicitly disabled. model_fast_disk() then treats this as False.

Environment

• OS: Windows 11
• GPU: AMD Radeon RX 9070 XT / RX 9060 XT
• PyTorch: 2.15.0a0+rocm10.1.0a20260822
• HIP: 7.16.26332
• ComfyUI: current master
• C: drive: PCIe 3.0 x4 NVMe
• D: drive: PCIe 4.0 x4 NVMe
• Dynamic VRAM explicitly disabled with --disable-dynamic-vram

Reproduction

Start ComfyUI with --disable-dynamic-vram and load a model from the PCIe 4.0 x4 NVMe drive.

Observed:

[INFO] Model storage policy: fast_disk=False paths=['D:\\ComfyUI_windows_portable\\ComfyUI\\models\\diffusion_models\\anima-base-v1.0.safetensors']

Testing comfy-aimdo directly without initializing it returns None.

If Aimdo is initialized first:

import comfy_aimdo.control as c

print("vendor =", c.detect_vendor())
print("init =", c.init())
print("lib =", bool(c.lib))

import comfy_aimdo.storage as s

print("C =", s.fast_disk(r"C:\Windows\System32\kernel32.dll"))
print("D =", s.fast_disk(
    r"D:\ComfyUI_windows_portable\ComfyUI\models\diffusion_models\anima-base-v1.0.safetensors"
))

the result is:

vendor = rocm
init = True
lib = True
C = True
D = True

So the Windows NVMe detection itself appears to work correctly.

Expected behavior

Automatic fast-disk detection should still work when Dynamic VRAM is disabled.

Storage detection probably needs either:

• Aimdo initialization independent of Dynamic VRAM, or
• lazy initialization of the native backend when comfy_aimdo.storage.fast_disk() is used.

Workaround

Explicitly passing:

--fast-disk

works around the issue.