running win 98 with quantum 10.2 7200 rpm ata100 interface. I have a ecs k7vza rev3 motherboard which supports the ata 100. I installed the 80 oin cable for it, problem is i dont know if its eneabled. How can i find out and if its not, how do i change it.
Thanks in advance, casper

Hi casper,

IDE Hardware connects at various speeds, today including transfer rates from PIO mode 4, UDMA mode 2 (ATA33), to UDMA mode 4 (ATA66) and UDMA mode 5 (ATA100). Generally you cannot change the rate at which a device connects at (unless you have a UDMA 4/5 capable device and you are connecting with a 40pin/40wire cable).

You can see what the transfer rate is for each device connected to the motherboard's chipset IDE Controllers at the POST Summary table which displays just before the Operating System loads. IDE Devices connected to onboard or PCI ATA/RAID Controllers are displayed separately.

Taken from
HERE (http://www.anandtech.com/guides/viewfaq.html?i=67) which is actually a great read regarding DMA and UDMA differences.