Sony Storage Support

Storage Support USA

How to enable DMA transfer?

Answer:

Most hard drives and optical drives (CD-ROM, DVD-ROM, CD-R\RW, DVD-R\RW\RAM, DVD+R\RW, etc) support DMA (Direct Memory Access) transfer. You must enable DMA (Direct Memory Access) to guarantee the best video quality and performance.

To enable the DMA capability of your drives please go through the following steps:

For Windows 98SE or Win ME:

  1. Close all running applications and disable anti-virus software
  2. Open the device manager by performing the following actions: Click on Start, select Settings, click on Control Panel, double click on the System icon, click on the Device Manager tab. Make sure that the "View device by type" check box is checked. You should see a list of items like "disk drives", "keyboards", "floppy disc drives"
  3. Click on the + sign next to "disc drives". A list of all the Hard Disk Drives (HDD) on your PC will be displayed. For example: "Generic IDE disk type 47", "IBMDCLT30L10" or "Quantum fireball LT".
  4. Click on the first disk name, this will highlight the name of the HDD.
  5. Keep the mouse pointer on top of the disk name, and right click. A list of options will appear, select Properties.
  6. Click on the settings tab.
  7. You should see a checkmark next to "DMA". If you don't see a checkmark, please click in the empty box in front of "DMA". Please note that some hard drives do not support DMA, in this case this option will not be available. If you check the DMA box, Windows will display a warning windows. If your HDD is recent (1999 and up) click OK, otherwise check if the drive support DMA transfer by contacting the drive manufacturer. You can usually find this information through the HDD manufacturer web pages.
  8. Close all windows by clicking "OK" or "Close".
  9. Windows may ask you to restart the PC. Please follow the instructions and restart the PC.
  10. Repeat steps 2 to 9 for all Hard Disk Drives on your PC.
  11. Repeat steps 2 to 9 for all optical drives on your systems (click the + sign before CDROM instead of Disk Drives)

For Windows 2000:

  1. Close all running applications and disable virus software.
  2. Open the device manager by performing the following actions: Click on Start, select Settings, click on Control Panel, double click on the System icon, click on the Hardware tab, click on the "Device Manager" button. Make sure that the "View device by type" check box is checked in the View menu. You should see a list of items like "disk drives", "keyboards", "floppy disc drives"
  3. Click on the + sign next to "IDE ATA/ATAPI controllers". You should see a list of at least one Bus Master IDE controller (for example Intel 82801AA Bus Master IDE Controller or VIA Bus Master IDE Controller) and one primary and one secondary IDE channel.
  4. Click on "Primary IDE Channel", this will highlight the text.
  5. Keep the mouse pointer on top of the text, and right click. A list of options will appear, select Properties.
  6. Click on the Advanced Settings tab.
  7. You should see a set of settings for Device 0 and device 1, make sure that the transfer mode is " DMA if available" for all devices. Note that some drives do not support DMA in this case this option will not be available.
  8. Close all windows by clicking "OK" or "Close".
  9. Windows may ask you to restart the PC. Please follow the instructions and restart the PC.
  10. Repeat steps 2 to 9 for all IDE channels on your PC.
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