how do i enable DMA transfers,also my C.....

[loul]

After running SiSandra program i have been advised to 'enable DMA transfers' as this improves performance.Sadly i have'nt a clue how to?
Also,my cd-rom cache size is set at 214kb and i'm again, advised to improve size....how?
AND finally (while your here)in windows information i am told 'double buffering is only needed for real time mode scsi devices?
What are these and if needed how do i disable them?....Much appreciated

[wtp]

to enable DMA transfers. Hold ALT, and double click on MY COMPUTER. This will bring you to this System Properties Screen.Go to the Device Manager Tab. Click in the [+] in Disk Drives, and you should see your Harddrive. If it's IDE, it should say something like Generic IDE Disk Type47, something like that. Click on that, and click on properties. Click in the Settings tab, then click on DMA to check it. Then click ok. (If DMA is supported, the next time you load windows, that check will still be there.) Before you click on OK and leave the system properties screen. Click on the Performance tab. Then go to Advance Settings, in "File System". Click on the CD-ROM TAB. Make the Supplemental cache size, on LARGE. Make the optimize access pattern for "quad speed drives and higher". Click on APPLY. Then Click OK in the system properties screen. Restart Windows,and your set! http://sysopt.earthweb.com/forum/smile.gif

wtp http://sysopt.earthweb.com/forum/smile.gif

[thekingofpain]

Right click my computer>properties>device manager>diskdrive>select the drive>settings> see the dma tab? click that baby! and bail...prepare to experience the wonderful world of UDMA! http://sysopt.earthweb.com/forum/smile.gif

Sudden edit--->OOH! WTP's got somethin on me, go forward! http://sysopt.earthweb.com/forum/smile.gif



[This message has been edited by thekingofpain (edited 07-04-2000).]

[Wilan Wong]

When I turn on the DMA, I don't notice ANY performance gain. I was just wondering if anybody ever had a noticeable performance gain??

[BFlurie]

Wilan, it generally won't. Really, what it does is relieve some pressure off the CPU's load while disk I/O is occurring. Doubt if you notice that unless you're multitasking extensively. However, with older mobos, drives, etc., DMA mode can be alittle flakey compared to PIO4 mode -- seems more so w/CDRoms.

[This message has been edited by BFlurie (edited 07-06-2000).]