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Windows XP could have switched off DMA disk access.
My notebook became lately very slow, starting up took more than 5 minutes, preparing to hibernate a similar time, the mouse worked now and then only, switching programs was sometimes normal, and sometimes a nightmare. And the processor seemed to be Idle.
So I tried everything, defragmented the disk, cleaned the registry, removed some programs, but nothing helped.
When I nearly gave up and asked servicedesk to format my disk and reinstall Windows
I found this: http://winhlp.com/node/10http://winhlp.com/node/10. Running the attached script and restarting Windows solved my problems.
Apparently Windows keeps some counters to monitor DMA disk access. After 6 DMA errors Windows switches off DMA (fast) and uses PIO (slow) on that device. There is no way back, the only option is to uninstall and reinstall the device. These errors can happen for example on recovering from Standby mode, on hardware errors, or detaching from a docking station?
The article describes how to delete these counters and provides a script which does the work. Since the DMA capabilities of the drives are redetected on rebooting, deleting the counters does not make any damage.
So if you have similar problems, stop searching, and try this solution.
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Windows XP could have switched off DMA disk access.
My notebook became lately very slow, starting up took more than 5 minutes, preparing to hibernate a similar time, the mouse worked now and then only, switching programs was sometimes normal, and sometimes a nightmare. And the processor seemed to be Idle.
So I tried everything, defragmented the disk, cleaned the registry, removed some programs, but nothing helped.
When I nearly gave up and asked servicedesk to format my disk and reinstall Windows
I found this: http://winhlp.com/node/10http://winhlp.com/node/10. Running the attached script and restarting Windows solved my problems.
Apparently Windows keeps some counters to monitor DMA disk access. After 6 DMA errors Windows switches off DMA (fast) and uses PIO (slow) on that device. There is no way back, the only option is to uninstall and reinstall the device. These errors can happen for example on recovering from Standby mode, on hardware errors, or detaching from a docking station?
The article describes how to delete these counters and provides a script which does the work. Since the DMA capabilities of the drives are redetected on rebooting, deleting the counters does not make any damage.
So if you have similar problems, stop searching, and try this solution.
[/COLOR]
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