Originally posted by Richteralan
First, there’s no much speed improvement for your CD-ROM/CD-RWs running higher than UDMA2. UDMA2 already providing 33MB/s transfer rate and should be enough for almost all CD-ROMs.
If you read this thread again, you will see that although black~cobra is using the term M-W UDMA Mode, the thread tile uses the correct description of Multi-Word DMA-2. I took his meaning as M-W DMA mode 2, as the multiword description is usually dropped when describing true UDMA modes. M-W DMA mode 2 has a transfer rate of 16.6 MB/sec.
Second, if one of your device can’t run higher than UDMA2 and you connected with the same cable, then the whole IDE Channel can’t run modes higher than UDMA2.
e.g: Device A support up to UDMA4, and Device B support up to UDMA2 and you connect them with the same cable to an IDE Channel, then that channel can’t run higher than UDMA2.
This is incorrect, and hasn’t applied for years except to old hardware. Modern IDE controllers have independent device timing which allows each device to operate at its rated connection mode.
Third, Via 4in1, aka Hyperion 4in1 driver, is no use for IDE devices running above UDMA2/3. The best driver is to download IDE miniport driver 3.014. It provide full UDMA6 support under Win2000/XP(with latest service pack).
He is not using the Hyperion 4in1 driver, but v4.42. The IDE miniport driver version 3.014 was released over a year ago. Why is the the best for WinXP?
BTW, the person to which you suggested this driver in another thread had to remove it as it would not let CD Speed and DVD Speed run.