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SATA drive supports UDMA Mode 7 but only runs in Mode 5

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March 16, 2009 10:54:20 PM

I have a PC with a Gigabyte EP43-DS3L motherboard, and a Samsung HD322HJ 320Gb Sata drive. The machine has Windows XP Pro installed on it. I notice in device manager (and also in the HD Tune) utility that it is running in UDMA-Mode 5, when it apparently supports UDMA-Mode 7. In the bios, the sata mode is set to native IDE mode, rather than legacy IDE. I have never owned a PC with a sata drive before so, my question is...

1 - Do all sata drives run in native ide mode work at udma mode 5
2 - If not, how do i make it use the best possible mode it supports?

Any help would be much appreciated

Thanks
a b G Storage
March 17, 2009 6:36:34 AM

could be native IDE, but either way its not going to matter - nothing can burn faster then ~24 mb/s (~18x) VS UDMA5's 100mb/s (~76x DVD) limit - ignore it, it aint going to matter.
March 20, 2009 11:57:09 PM

Both of my samsung hdd's F1 and F2 run at udma5 and the HPA is active on both drives.I set the motherboard bios to combined mode(2PATA/2SATA).
I can disable the HPA but it run at mwdma2 only.

Hdd's were tested on foxconn G31MG-S and gigabyte EG31M-S2 motherboard.

The hdd tool i use is HDAT2 v4.5.3 http://www.hdat2.com/download.html
April 26, 2009 11:55:11 PM

not quite right there u need smasung HITUL utility to change the UDMA if your motherboard supports higher then UMDA 5 (it will test wether your motherboard can support it ) mines currently running at UMDA 6 (can show u a screen of HD tune if you think i'm lieing ) tho the higher the sequential read and write become (increase in UMDA ) will cause lower random access times and higher CPU usage

also apache_lives were talking about a HDD here .. so it DOES matter as the HDD can work at UDMA 5 or higher
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