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How to enable UDMA mode 6 on VNF3-250 MOBO?

Hurricane Andrew

Hurricane Andrew

Golden Member
I have a Maxtor 160GB drive that is ATA/133, but for some reason it only shows as being UDMA mode 5, ATA/100. Yes, I've installed the chipset drivers for the MOBO, which is a Chaintech VNF3-250. I've gone into device manager, and into IDE ATA/ATAPI controllers, and UDMA mode 6 doesn't appear on the list of options. I do have the latest BIOS for the MOBO, so that's not the issue.

Any thoughts? System specs are in my sig under First Home Build...
 
Originally posted by: Hurricane Andrew
I have a Maxtor 160GB drive that is ATA/133, but for some reason it only shows as being UDMA mode 5, ATA/100. Yes, I've installed the chipset drivers for the MOBO, which is a Chaintech VNF3-250. I've gone into device manager, and into IDE ATA/ATAPI controllers, and UDMA mode 6 doesn't appear on the list of options. I do have the latest BIOS for the MOBO, so that's not the issue.

Any thoughts? System specs are in my sig under First Home Build...
Click to expand...

Could be an OS issue for all I know, although I don't think that there's a registry hack for mode 6 like the "EnableUDMA100" entry for mode 5. I hope you solve your problem, but even if you don't, at least all you're actually missing out on is slightly faster burst rates.
 
one other thing - the difference in theory between ata 5 and ata6 is 25%, but in practice, you probably won't get 133MB/s transfer rate. If you were lucky, you might get a burst of 128or so, then settling down to 110 [give or take - please don't shout at me!!]
with ATA100, maybe a burst of 90 would be expected
 
Originally posted by: montag451
one other thing - the difference in theory between ata 5 and ata6 is 25%, but in practice, you probably won't get 133MB/s transfer rate. If you were lucky, you might get a burst of 128or so, then settling down to 110 [give or take - please don't shout at me!!]
with ATA100, maybe a burst of 90 would be expected
Click to expand...

It wouldn't settle down to 110, because the drive couldn't physically sustain that transfer rate. You're right about burst rates, though; on ATA100 you wouldn't get the theoretical maximum.
 
sorry - that is true about ATA100.
What i was trying to say is that, although there is an improvement, it isn't gonna be by that much
 
Hey, don't apologize to me. I'm a complete idiot. I'm just parroting what I've read in the past. It's not like I've ever built a hard drive with my bare hands... 🙂 We're in agreement-- it's not a big deal performance-wise.
 
If I were you I wouldn't worry about it. It won't affect performance noticeably and because the only thing that'll possibly slow are burst transfer rates and it won't even affect those much (think about it...8 meg cache at either 100MB/sec or 133MB/sec takes less than a 30/th of a second which you won't notice). The drive probably gets between 40 and 60 MB/sec sustained transfer rates maximum. You can't fill an ATA100 pipeline with that.

If you want to get another drive it would be slowed down by running on the same channel as this one as they could potentialy fill an ATA100 pipeline but that board has SATA so why not upgrade with an SATA drive, right?
 
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