RAID 1 and size problem

Remove the code tags from your post so people can actually click on the links. You need UEFI in order to boot from a GPT partitioned disk. You didn't mention if this is to be a bootable raid or just storage.

http://www.tomshardware.co.uk/forum/283723-14-drive-sho...

My mobo:
http://www.asus.dk/Motherboards/Intel_Socket_1155/P8Z68...

Sorry used to a bbcode forum where you most code all links...

It's for storage only

Your mobo supports large hard drives if its UEFI.

As long as you have Windows 7, you'll be ok.

After you set the drives up in RAID, when you boot in to Windows, you'll set the drive(s) up in GPT, not MBR, due to size. GPT gets over the 2.2TB limit.

Now, I don't know if you can install the OS to a 3TB hard drive, but you said it'll be for storage only. So you are good.

Cheers.

OS isn't installed on the 2x 3TB HDDs - got it on a SSD which were installed months ago
The 3TB is storage and want it in RAID 1 so it's backed up - that's what bug me + the 746GB problem (would be nice to know step for step to do)

Once you install the drives, go to Disk Management to set them up. It'll do it almost automatically.

Start/Computer/right-click/Choose Manage/Disk Management.

Follow foscooter's suggestions. Your 746GB experience is very indicative of the drive(s) being formatted/intialized as MBR instead of GPT.
Delete the partition completely and reformat with GPT, should see it all...

You agree it's GPT now?

http://img339.imageshack.us/img339/900/45590489.png

Also runned it in commando prompt and it's it's set as RAID - but still 746GB =/

As stated, it simple. Create the raid container via the raid bios. Use disk management to initialize the array, selecting GPT when asked to select a partition type.

Looks like you didn't read what I wrote - already RAID (checked with commando prompt) + already GPT but still it's 746GB =/

http://img339.imageshack.us/img339/900/45590489.png

Ah, sorry, you need to upgrade your RST driver.

http://downloadcenter.intel.com/SearchResult.aspx?lang=...

AHHHHHHH Thansk a lot mate   would never have guessed that lol

Yes, you need version 10.1 or later of the RST. Let us know how it goes for ya.

working 100% now   even mirrored the HDDs so no prob  

Sweet! Glad that got you working properly.