Well, In fact I do (as you can see from my configuration). I have a similar server running with hot standby replication - and it runs two 3T HDD in a RAID1 array.
So - is it still very bad if I choose to put four intel 520 disks in a RAID10 array on the other production server?
Yes, i am aware of this issue. Never experienced this neither on intel 520, no ocz vertex 3.
I wouldn't trust either of those drives. The 520 doesn't have Intel's " Enhanced Power Loss Data Protection"; it's going to lose its buffers if it loses power. Similarly, the Vertex 3 doesn't have any kind of power protection. See:
The only way I'd use those for a production server was if I had synchronous replication running to another machine with trustworthy, durable storage - and if I didn't mind some downtime to restore the corrupt DB from the replica after power loss.
