FAQ for all DVD/CD Drive Models

DMA settings / HD controllers

NOTE:This page provides general tips for DMA settings for RICOH ATAPI drives.

We often get questions about how to enable DMA, but please note that it is best not to change anything generally, if you have no problem and the drive works well. By changing DMA to enabled, you may cause other problems that you do not expect.

Please understand the DMA setting depends on the following environmental factors. As an ATAPI peripheral any Ricoh ATAPI model is controlled by these factors. A quick review of these factors may help a problem with DMA settings.

  • BIOS settings on the motherboard.
  • The chipset.
  • The HD controller driver or the version of the driver.
  • A combination of all of the above.
If the information on this page does not help, please consult the PC manual or the PC manufacturer.

 

 

Cannot enable the DMA option.

First, DMA has several Standards.
The DMA supported by the drive may not be supported by your PC. Check the transfer mode supported by both the drive and the PC. You will be able to find both of them from the manual,the spec page, orhere.


Next, refer to the following general tips for DMA settings.

  • Check the BIOS setting at the IDE channel connected with the drive, to see if the DMA mode is supported and enabled.
  • Update the HD controller driver.
  • Change the HD controller driver to the Standard IDE controller.
    The following are several examples fixed or reported. Please check them to see if they are relevant to your problem.

[Intel 815E chipset]

When the 'Intel UltraATA Storage Driver' is installed, the DMA option may not be found in Device Manager.

In this case, DMA setting will be possible at the following locations:

Program > Intel Ultra ATA Storage Driver > Companion.

After running the Companion, select your Ricoh drive and double click on 'Transfer Mode Limit,' which is located on the right side.
Double click Parameter Data, the default setting will be 'No Limit,' click the pull-down menu and choose the option you want.

  • PIO 4 will disable DMA.
  • DMA MW 2 or DMA 2 will enable DMA.

DMA MW 2 stands for "Multiword DMA mode 2", DMA 2 means "Ultra DMA mode 2."
The DMA mode shown depends on the DMA mode supported by the drive.
If the driver version is 6.10 or less, "Close" button will save the setting and quit.
If the driver version is 6.10.011, you will have to save the setting before quitting this tool.
For details, please consult your manual or the supplier.


[VIA chipset]

A PC has a VIA chipset installed, you may not be able to find any DMA option in Device Manager.

Check the CD that came with the motherboard. The program that installs the IDE Busmaster driver may have an option for DMA settings. For details, consult the manual.


[ASUS CUBX, ASUS P3B-F AWARD BIOS with MP9120A]

For the BIOS, at the Main menu, IDE settings, change [AUTO] to [Other ATAPI Device], then manually set [2] at ULTRA DMA MODE, and reboot. A case fixed by this solution was reported.

[ATA 100 card]

There was a case reported that DMA option cannot enabled, after an ATA 100 card was installed and the drive is connected with the card. We have no information on this isse.

[Intel Application Accelerator]

Click here for details.

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DMA option is disabled after rebooting.

This could be caused by the BIOS, the Chipset, the HD controller driver, or its version, or any combination of these. Items that should be checked are, for instance;

  • In the BIOS, whether or not each of IDE channels supports Ultra DMA. Enable or Auto will be OK, but Disabled may turn it off.
  • Updating the HD controller driver will help.
  • Changing the HD controller driver to the Standard IDE controller will help.
 

Does my drive support DMA?

You will find the specifications of the drive in the manual orhere. TheDrive Information pagesalso offer information about the specifications of each drive.
 

How can I check the DMA settings?

[Windows 9x / Me]
Go to Control Panel > System > Device Manager > CD-ROM.
Double click on the CD-ROM to show your drive.
Double click on the RICOH drive and select the Settings tab.

[Windows NT4 / 2000]
Go to Control Panel > System > Hardware.
Click Device Manager.
Double click IDE ATA/ATAPI controller, which will show the IDE controller.
Select Primary or Secondary IDE Controller, based on which one your drive is connected.
Select the Advanced Settings tab.

[Windows XP]
My Computer > Right button click to Properties > Hardware.
Click on Device Manager > IDE ATA/ATAPI controllers.
Select Primary or Secondary IDE Controller, based on which one your drive is connected.
Select the Advanced Settings tab.

When the DMA option does not appear, check the Utilities provided by the HD controller. The instructions below are about the Intel Application Accelerator.

[In a case where the Intel Application Accelerator (IAA) is installed:]

The following is an example with a Ricoh drive designated as a Secondary Master:

Start > Program > Intel Application Accelerator

Go to Devices located at the left of the screen, double click on Secondary, click on Master.

Go to Parameters located at the right of the screen, double click on Transfer Mode Limit Parameters. From the drop-down list, you will be able to choose either of the following.


  • to enable DMA: click on UDMA-2
  • to disable DMA: click on PIO-4
File > Commit Changes Now > Follow the instruction to restart the system.

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How can I check the HD controller?

[Windows 9x / Me]
Control Panel > System > Device Manager > HD Controller.

[Windows NT4 workstation]
Control Panel > SCSI Adapter > Device > IDE Controller.

[Windows 2000 pro]
Control Panel > System - Hardware > Device Manager > IDE Controller.

[Windows XP]
My Computer > Right button click to Properties > Hardware > Device Manager > IDE Controller.

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I enabled the DMA option, now the drive will not work well, and sometimes the PC freezes.

Check to make sure if the drive works well with the DMA disabled first. If you want to try it enabled, try the following.

  • Update the HD controller driver. For details, please visit the PC or Motherboard manufacturer's web site. Or consult them directly.
  • Update the BIOS. For details, please visit the PC or Motherboard manufacturer's web site. Or consult them directly.
  • Try changing to the Standard IDE controller that comes with the Windows OS.

Remember, the setting is controlled by the PC or the HD controller. The drive itself cannot control any settings.
 

DMA transfer mode supported by each model

The table below shows the transfer rate of RICOH MP products.
Model Name Data Transfer rate at the Interface
MP5240A / MP5125A / MP5120A 33 MB/sec. (Max.) Ultra DMA mode 2
MP9200A / MP9120A / MP7400A / MP7320A / MP7200A 33 MB/sec. (Max.) Ultra DMA mode 2
MP9060A
MP7125A / MP7120A
MP7083A / MP7063A
MP7080A
16.7 MB/sec. (Max.) Multiword DMA mode 2, PIO mode 4
MP7060A 11.1 MB/sec. (Max.) Multiword DMA mode 2, PIO mode 3
MP7040A 16.7 MB/sec. (Max.) Multiword DMA mode 2, PIO mode 4
MP6200A 11.11 MB/sec. (Max.) PIO mode 3

Reference: This table gives general information about ATA transfer rates.

TYPE MODE Transfer Rate [Mbytes/s]
PIO 0 3.33
1 5.22
2 8.33
3 11.11
4 16.17
Single Word DMA 0 2.08
1 4.16
2 8.33
Multi Word DMA 0 4.16
1 13.33
2 16.67
Ultra DMA 0 16.67
1 25
2 33.33
3 44.44
4 66.67
5 100
 
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