Here's a little trick, even for the first drive (C). If Windows disables
DMA, it isn't easy to reenable it because it does that after a certain
number of errors over a period of time. It then assumes the drive can't
handle DMA (at whatever level) and shuts it off. In control panel,
uninstall the physical drive. It will tell you it will happen at reboot.
Reboot. It has wiped the status bits and such upon removal, and for a
normally removed piece of hardware, it would be gone on reboot. However,
removing the hardware doesn't affect the boot sector or files on the
drive, so when it reboots, BIOS boots the drive, Windows starts, it
'sees' your 'new' C drive (or other drive) and reinstalls it. All is reset.

Always works here, but as they say, YMMV. ;-)

-Skip


Hector Martin wrote:
> 2-3MB/s is much too slow. Check your DMA status - Windows sometimes 
> randomly decides to disable DMA on a hard drive, and the only way to 
> reenable it is to screw around with the registry. 
>   

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