Unusable Unallocated Space

[PieceMaker42]

Hey guys,

I recently got two 1.5 TB drives and set them up in a RAID 0 array. After creating the array using a built in controller on my ASUS P6T motherboard it looks like one large drive, but once I install the OS (Windows 7 RC) it discovers that I cannot do anything with about 731.52 GB of that space. It will not allow me to format or create a new drive. It becomes completely dead space. Here is a pic of my predicament.

 

[MikeJRamsey]

What are the drives (manufacture/model)?
Is your BIOS up to date?

arpharazon suggested this from Xp
"Under Administrative Tools>Computer Management>Disk Management I right-clicked the drive in question (ST31500343AS) and deleted the original partition I set up with my XP disk, then set it up again and quick formatted and now it shows 1.36TB, which is closer to acceptable than .99TB."

 

[PieceMaker42]

My BIOS is definitely up to date, I checked last week. Even after I delete the original partition it has an unusable section. I am going to wipe both my HDs and start over to see if that fixes the problem. It will take all night, but I have been trying to fix this for the past 2 days with no avail.

 

[PieceMaker42]

After clearing all data from both my hard drives and still having the issue. I noticed that it was cutting enough space off to make it a 2024 GB partition with the rest being unusable. I though 2024 GB ie 2 TB was kind of a unique number, sure enough ... I had to create 2 RAID arrays with sizes less than 2 TB for my motherboard to make all that data usable. Hope this helps someone else in the future...