Turn Off disk cache?

[john3]

In an effort to measure disk read speeds, I need to turn off disk caching of the Fortran binary file. As it is, the file size must become greater than about the size of the of installed memory before true disk read rates can be measured. Is there a way to do this?

My goal is compare Linux read IO vs Win and to figure out how best to set up RAID 0 arrays for stripe size and also to compare 15k rpm scsi raid drives against 10k rpm WD Raptors.

Platforms: IVF 9.1 Win 32 and Win 64; Linux IVF 9.1 32 and 64 bit.

Thanks.

John

[Steven_L_Intel1]

As far as I know, this is not something you can control. It is primarily handled by the drive itself, and perhaps by Windows.