On 2019-02-25, 13:51, "fio-owner@xxxxxxxxxxxxxxx on behalf of neto from Brazil" <fio-owner@xxxxxxxxxxxxxxx on behalf of Antonio.Jose.Rodrigues.Neto@xxxxxxxxxx> wrote: > fio: io_u error on file \\.\PhysicalDrive1: Permission denied: write offset=504457322496, buflen=4096 I think that is the critical message: Permission denied. So, there might be a difference from one version of Windows to another, or perhaps you are using a different user? Also, is PhysicalDrive1 the same location on both servers (ie: PhysicalDisk1 is available for writing, and not part of a volume span, or hosting the OS, etc?) Regards, Mark