# Can someone explain the physical architecture of RAID 10 in complete layman's terms? [duplicate]

I am a newbie in the world of storage and I am having a hard time digesting the physical architecture of some of the RAID levels. I am particularly interested in RAID 10, and 50. I asked the question specifically about RAID 10, because I feel if I understand that, I'll understand the other.

So, I get the definition of RAID 10 - "minimum 4 disks, a striped array whose segments are mirrored". If I've got 4 disks and Disks 1 and 2 are a mirrored pair, and Disks 3 and 4 are a mirrored pair - where does the data get striped?

Thanks.

In the following A, B, C, D area pieces of data.

RAID 0:

``````DISK1    DISK2
A        B
``````

RAID 1:

``````DISK 1   DISK2
A        A
``````

RAID 10:

``````DISK 1   DISK2   DISK3   DISK4
A        A       B       B
``````

RAID 5: (p is parity, recovery information)

``````DISK 1   DISK2   DISKn
A        B       p
``````

RIAD 50: (p and q are parity, it's two of the above side by side...)

``````DISK 1   DISK2   DISKn   DISK4   DISK5   DISKm
A        B       p       C       D       q
``````

http://en.wikipedia.org/wiki/File:RAID_10.png

you have 2 raid 1 that go together into a raid 0 - raid 10.