I have a Lenovo V-Series Laptop 81HN V130-15IKB. It is a 2019 model laptop and should support AHCI. However the information from HD Tune seems to indicate that it is using UDMA Mode 5:

HD Tune Screenshot

I think the hardware (motherboard and HDD) are not that old and that the software is supposed to show something like AHCI or UDMA Mode 6. Note that I never installed any drivers and let Windows Update manage the drivers:

Intel AHCI Controller Driver in Device Manager

So, is my HDD performing the way it should? I think the HDD is not using a feature called NCQ and I feel like it is thrashing so bad.

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1 Answer

I think that there is some confusion : UDMA does not conflict with AHCI. AHCI only conflicts with IDE or RAID.

Ultra DMA (UDMA) is an evolved version of Direct memory access (DMA). Both are methods used for transferring data from main memory to a device without passing it through the CPU. Without (U)DMA, the CPU would be occupied for the duration of data transfer, with horrible consequences for performance.

There is no conflict, and your device is likely functioning correctly. Native Command Queuing (NCQ) is usually automatically enabled, if supported by the device.

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