OK, I'm a visual person when it comes to learning, so for me, I have to be able to picture in order to understand. After searching the web, I think I have grasped what RAID 10 is, and how it differs from RAID 0+1. (Which I understand perfectly). So I'm going to (try to) explain what I think it is, and I'd like you to tell me if I'm correct. For the sake of trying to keep this simple, things such as formatted capacity should be ignored. Also note, I'm simplifing the language that is traditionaly used in RAID explanations.
So, for RAID 10, I'm going to have 4 disks. Disk1 (10GB), Disk2 (10GB), Disk3 (10GB), and Disk4 (10GB), radical concept eh?
Lets start with the 'RAID 0' which I'll say are Disk1 and Disk2, they are combined to make what the OS will see as one (1) 20GB Drive (again ignoring formatted capacity). Going by how the OS will see it, we'll call it Drive A.
Now the 'RAID 1' part will be with Disks 3 and 4, which are simply copies of what's on 'Drive A'. Each one has a full copy.
The problem of course is that in a RAID the amount of actual avalible disk space is only as much as your smallest disk. In the case, 10GB. So Drive A, despite having 20GB capacity, only 10GB can be used.
Soution (?): Now if the size of Disks 1 and 2 were changed to 5GB, then when put into the RAID 0, Drive A would be 10GB, the same as our mirrored Disk 3 and 4, there for preventing wasted disk space, right?
So, for RAID 10, I'm going to have 4 disks. Disk1 (10GB), Disk2 (10GB), Disk3 (10GB), and Disk4 (10GB), radical concept eh?
Lets start with the 'RAID 0' which I'll say are Disk1 and Disk2, they are combined to make what the OS will see as one (1) 20GB Drive (again ignoring formatted capacity). Going by how the OS will see it, we'll call it Drive A.
Now the 'RAID 1' part will be with Disks 3 and 4, which are simply copies of what's on 'Drive A'. Each one has a full copy.
The problem of course is that in a RAID the amount of actual avalible disk space is only as much as your smallest disk. In the case, 10GB. So Drive A, despite having 20GB capacity, only 10GB can be used.
Soution (?): Now if the size of Disks 1 and 2 were changed to 5GB, then when put into the RAID 0, Drive A would be 10GB, the same as our mirrored Disk 3 and 4, there for preventing wasted disk space, right?
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