The writing of OpenEXR is very slow at the cash use QNAP.

[flat]

The writing of OpenEXR will become very slow if ssd-cache is used by QNAP NAS.
other image formats　（TIFF） is No Problem.
and also V-RayMaya 3.10.01 no problem.

confirms in V-Ray 3.40.04 with Maya2016 SP4 Win7sp1
Use QNAP model: QNAP TS-EC1680U 32G 75TB

There is no same report?

[vlado]

No, we have not had the same reports. The OpenEXR library is the same between V-Ray 3.10 and V-Ray 3.40, so I'm not sure where the problem might be. Can you check other versions (3.20, 3.30)?

Best regards,
Vlado