Tips T0019
Turning
On DMA For Your Hard Drives
If
you are using your PC for video editing, you will want
to transfer data to and from your hard disks as quickly
as possible. This means that you should turn on DMA
data transfer from within Windows By selecting DMA on
the hard disk that you capture to, data can be transferred
directly to the hard disk requiring very little CPU
power to do so. This leaves the CPU free during capture
to process the incoming video and perform any video
compression.
Windows 98/ ME:
To make sure DMA is turned on, right click
on "My Computer" from the Windows desktop
and select "Properties". Click on the "Device
manager" tab and open up the branch marked "Disk
drives":
There should be one driver for every IDE hard disk that
you have. There are two IDE drives in the picture above.
For
each IDE drive, select it in the list and click "Properties".
Now select the "Settings tab":
Ensure the DMA item is checked and click on OK. Repeat
this process for every IDE driver you have in the list.
Click
"OK" to close the System Properties dialog.
If you are prompted to restart, click "Yes"
to restart your PC.
Windows 2000:
To
make sure DMA is turned on, right click on "My
Computer" from the Windows desktop and select "Properties".
Click on the "Hardware" tab. Click the "Device
Manager" button to open the Windows Device Manager:
Expand the "IDE ATA/ATAPI controllers" branch.
You should see an entry for every IDE channel that you
have in your PC - most PCs have 2 channels.
For
each IDE channel, select it in the list and click the
"Properties" button . Click the "Advanced
Settings" tab:
Ensure that DMA is selected for both devices. Repeat
this process for every IDE channel you have in the
list. Click
"OK" to close the System Properties dialog.
If you are prompted to restart, click "Yes"
to restart your PC.
Windows
XP
Windows
XP will turn on DMA by default if possible, so normally
you should not have to do this. If you do have to
enable DMA, follow the instructions for Windows
2000.
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