Originally Posted by frazell
How would fragmentation have anything to do with HDTune? HDTune is reading data off the drive in a sequential manner, but that isn't user data. If it were using the user data, which could be fragmented, it would have to first fill the rest of the HDD with random data.
Fragmentation has NO effect on HDTune it just doesn't make sense.
What is happening is you might have some backgroup process stealing I/O time, otherwise you either have a bad drive, bad cable, or a bad configuration.