RAID, RevoDrives and other miscellaneous questions

[Cafem]

I've had my RevoDrive since January, and I'm loving the speed it loads up the OS, but I do have some questions, and they're about RAID.
1) The boot up screen tells me that the RevoDrive is is SiL RAID 0, where there are 2 logical drives of 23GB each. Now my finger-maths tells me thats 46GB in total, on a drive that I bought with a (supposedly) 50GB limit. Is there some way to recover the lost 4GB, assuming it exists?
2) Please help me understand this RAID thing a bit clearer. My basic, laymans terms understanding of RAID gives me the impression that this 46/50GB drive is chopped in half in terms of storage, to give better transfer rates and file integrity. For a boot drive using an old 7,200 RPM spinner as backup, is this RAID setup worth keeping? The lack of space is really pinching atm.

 

[GhOsT1321]

You see less GB than the drive is rated at because drive manufacturers use decimal gigabytes which are a bit smaller than gigabytes measured in Windows which are measured in binary gigabytes.

 

[Peter.Cort]

I'd question how much the raid 0 setup would really improve times, because the idea of a raid 0 setup is that it uses 2 separate drives, storing data on both, and when data is called the drives simultaneously launch data at whatever is calling it. When you use a single drive split into 2 logical drives, it still has to go through the same connection which I would think would limit the speed improvement.

Unless somebody has some hard numbers, I think the only way to see would be to reinstall your OS and get rid of the 2 logical partitions making it a single drive again. Or just buy a new storage hard drive, prices are cheap enough that if you can afford a SSD you should be able to buy a 1tb drive for like 80 bucks