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Windows 2000 Ultra DMA

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by tim12

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I installed an Quantum Fireball AS30 20GB (7200rpm) ATA-100 on my compaq Presario 5838 running Windows 2000 server using Cable-Select as secondary drive on one 80pin cable. My primary drive is also a UltraDMA drive.

My questions and appreciateanybody's help:

Windows 2000 doesn't seem to allow both drive running on UltraDMA mode? The primary drive will somehow always run at PIO Mode even if I select the IDE Driver property as "DMA if available". The 2nd drive runs at ultra dma. WhenI switch the drive position (with great pain and installing software), which ever drive showing as Primary still run at PIO while the 2nd run as Ultra DMA? I installed Windows 2000 SP2 and all possible update from microsoft but still not result.Can anyone help?

3 replies

by sixfourtykilo

Ok, the setting in Windows for "DMA if available" has nothing to do with your drive's performance. Second, you shouldn't use the CS (Cable-Select) option since no drive really supports this anymore. You should have the jumpers jumped to slave and master (respectively) on each drive. Third, if you want to run ATA/100, you need to have 110 pin cable (ATA 66/100 rated).

To have your settings the way that you "need" them to work, you need to edit the BIOS. In the BIOS, you can determine the if the drive is UltraDMA, etc.

Hope this helps
640k

by shanghai sam

I did all the changes except the ATA/100 cable. My computer chip set support only upto UDMA 66 which is sufficient for me. I made sure all the master/slave set correctly, all the BIOS enabled.

Anyway, I still have the same problem.

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