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ATA/UDMA - compatibility question

Trish's Escape from Hardware Hell Help Board » Hardware » Hard Drive and Storage Related » ATA/UDMA - compatibility question « Previous Next »

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Adam Low
Posted on Sunday, December 15, 2002 - 2:51 pm:   

I have a system that is capable of going up to UDMA66 support. I want to add another 40GB HDD to it, and I am sure that my bios can support it. The question is, however, will my system be able to use HDD marked at ATA100, or even ATA133/150? Also, is UDMA66 the same as ATA66?
E.S.
Posted on Sunday, December 15, 2002 - 8:20 pm:   

Most systems with UDMA ATA66 support will run a Harddrive with ATA UDMA100/133 but at ATA UDMA66 only. Keep in mind that an off board solution such as a Promise Ultra100 or 133 off board pci controller will allow the drive to run at it's rated performance.

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