These numbers really seem like a single drive, so without trying to be rude... are you sure you didn't actually mirror them instead of stripe. Meaning you only have 1 gb available instead of 2. Respect.
4 500GB in Raid-5
4 GB DDR2
fresh build of vista 64-bit premium SP1
it was slow, I installed the Intel Matrix Storage manager 18.104.22.1682 and now see in the taskbar a icon with drives and the label "A volume initialization is in progress" so I am sure that is what is causing the slowness that is shown here:
I am using the Intel bios raid of the ICH10R chipset.
The icon is a 3-phase animated gif, looks like a floppy, then to pair of 2-slice drives with bottom of both blue, and the top of the back red and top of front grey, then the bottom of both grey and the top of both blue.
Sooo... I tested the RAID-5 of the ICH10R accidentally just now... I wanted to connect two other drives to copy some partitions, and only had one e-sata cable, so I figured I would go direct to the motherboard, and I removed the sata cable for the array instead of the one goign to the back of the PC.......
good news, it popped up a taskbar message saying the raid array was degraded...
bad news... when i reconnected, it popped up a message that said rebuilding array... it has to rebuild ALL OVER.. 16 hours... ewwww... better than corruption, I guess...