Weird hard drive issue

By milespower
Jul 18, 2012
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  1. Hey.

    So, my computer was running really slow, like really really slow, even transfering files so I benchmarked my HD and realized my 120GB Seagate Barracuda 7200.7 has a Sequential Read Speed of 3.0 MB/s when it should be around the 50MB/S mark.

    What's wrong?
  2. SNGX1275

    SNGX1275 TS Forces Special Posts: 10,689   +395

    Drive controller is in PIO mode rather than UDMA. Check/change this in device manager, its in the properties for your drive controller, one of those tabs. I'm not on a Windows machine now or I'd check - but you should be able to figure it out from this.
  3. milespower

    milespower TS Member Topic Starter Posts: 33

    it's on the BIOS though. Will do it next time I power up the PC.
  4. milespower

    milespower TS Member Topic Starter Posts: 33

    well, tuning the BIOS settings didn't work. Meanwhile, I found that a) my board somehow doubled the controller (2x Primary IDE, 2x Secondary IDE and I don't have any expansion card) b) the windows has "DMA if available" activated but it doesn't get out of PIO.
  5. milespower

    milespower TS Member Topic Starter Posts: 33

    Figured it out already. Uninstalling and letting Windows re-install the IDE primary channel driver worked. Apparently this is an obscure Windows function that after six consecutive DMA errors it starts "underclocking" from UDMA6 to PIO0

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