I can confirm the nForce 4 chipset works with Maxtor Diamond Max drives, as I've used many, with various firmwares.
All I can say, is check it with PowerMax as the HDD may very well be defective. (On an Intel chipset based system if you need to - you are a tech, act like one and stop crying. Real techs always have one of each system, if not more).
Now Maxtor (who own Quantum), have been brought out by Seagate (who are quite large now) 'issues' like this will become very rare indead.
Asus may have 'tweaked' their BIOS (defaults) to configure the chipset in an 'incorrect' (but it works 99% of the time) way. They've done this many times before in their early BIOS versions, just look how often they update.
Also
Disable AI NOS, (and all that 'new' Asus shit), so the drive can 'negotiate' a better interface connection, it may resolve 'other' issues you are having aswell, or haven't encountered yet.
Recently (well over a year ago, as some may recall) MSI started 'pretending' they where the 'new' Asus aswell, and implementing similar 'tweaks' to their chipset configurations. (CoreCell was just the start). You get a perfectly good chipset, a perfectly good HDD, and cables, then the board manufacturer BIOS has 'incompatibility issues'. (That is their offical stance on it anyway). Wow, the boards are pre-overclocked by 3% and it wins in benchmarks, shit it must be good (really are ppl that stupid ?, if so they deserve it for taking part fanboyism) with various tweaks that affect the IDE controller performance.... & reliability. (No real surprises there).
When you've got 25 mainboards from different manufacturers, Using 25 identical chipsets, the same model HDD (firmware version, etc) on all the machines, same video, RAM, etc, and some of them 'magically pull high performance out of their ass' you need to start asking questions and not take it for granted... really it'll be 100% stable out of the box, forever, in 100% of cases, out of millions of cases..... (Sure it will -
).
It took ATI quite some time to figure out why only 'certain boards' all of a sample using the same chipsets where having issues, but the brands gave it away. (Look at all the techdocs in
http://www.ati.com for some ideas), perhaps it may not be all that long until HDD manufacturer websites have techdocs indicating certain board/bios combinations do not work, but othes using the same chipset, and same Award BIOS are not affected at all.
The more people that figure this out, and the sooner they figure it out the better off the IT industry will be. Chipset performance doesn't vary 'that much' from just configuration alone.... Think straight.
(PS: I like the 'old' Asus / MSI better than the new one - They are always 'pushing the acceptable industry standards' and trying to make up their own).