P55-UD4P and a 3TB USB Hard Drive

[Cronus]

I've searched the forums and seen a lot of posts about people with 3tb drives only being recognized as 2.2tb, but my case is a bit different.  I have an external USB drive that's 3tb and is only being seen by Windows as 746.39gb.  Does anyone know how I can get the full drive recognized?

I have a P55-UD4P Rev1 board and have Windows 7 64bit installed.  I have the latest chipset drivers and the latest BIOS for this board installed.  I've also repartitioned the volume as GPT.

-Thanks.

[Lsdmeasap]

Did you delete all partitions before you formatted to GPT?  If not, or you are not sure, delete ALL volumes and partitions on the drive, then initialize it again as GPT

It could be the USB controller causing that, the one inside the drive I mean, or an incompatibility, but sounds like it just isn't setup right to me.

But, see this, it could be a firmware of the internal USB controller on the drive causing the issue
http://hardforum.com/showthread.php?t=1601981

And fnally, be sure you are using the latest Intel RST drivers, older ones do not support larger drives like that.   You want the third link here
http://downloadcenter.intel.com/SearchResult.aspx?lang=eng&ProductFamily=Chipsets&ProductLine=Chipset+Software&ProductProduct=Intel%C2%AE+Rapid+Storage+Technology

You are just wanting this for storage correct?   Just asking, because you wont be able to use it for booting an OS from, as your board isn't supported for the 3TB unlock feature
http://www.gigabyte.com/microsite/276/3tb.html

For your reference, here's a previous reply I posted here about the 2TB+  issue
http://forum.giga-byte.co.uk/index.php/topic,8049.msg64333.html#msg64333

[Cronus]

Thanks for all the links.  After reading them and your post it sounds like the enclosure is causing the problem.  I'm out of space internally, but tomorrow I'll swap it out with one installed and see if it reads as 3tb being installed directly.

I also was curious about your mention of the intel chipset drivers.  I've installed the latest from Gigabytes site, how does the driver you linked to differ?

-Thanks.

[Lsdmeasap]

Yes, it very well might be.   Can you remove the drive and test it outside of the enclosure?   I mean you can of course, but you have to be willing   Sorry, i reply as I read, I see you'll test this when you have time, great plan 

Intel's drivers are often more up to date is all

[Cronus]

It was the enclosure, in my machine it works great.  Thanks for the help.  Time to go look for an enclosure with a 64 bit controller.

[Lsdmeasap]

Nice to see you found the source of the issue!   You could write the maker of the enclosure and see if they will make a firmware update for you, sometimes they do update this and fix issues like that.