[bluegene]

May be I'm missing something here; Why there's even a discussion about RAID at the EBS level? When Amamzon says, "Amazon EBS volumes are designed to be highly available and reliable" and if we have to talk about RAID then the issue is on Amazon's end

[xpaulbettsx]

I think most people are doing RAID-0 to get more perf out of EBS volumes

[gregburek]

It also seems that in 2008 adding mirroring also hurt performance. I'm going to dive into this tonight to see if things have changed at all with these benchmarks.

"His results show a single drive maxing out at just under 65MB/s, RAID 0 hitting the ceiling at 110MB/s, RAID 5 maxxing out about 60MB/s, and RAID 10 “F2″ at under 55MB/s."

Summary source: http://www.nevdull.com/2008/08/24/why-raid-10-doesnt-help-on...

Data source (google cache): http://webcache.googleusercontent.com/search?q=cache:Vscz-VX...

[bmurphy]

Yes. Except, anybody who is doing RAID-0 over an EBS volume for perf reasons is ASKING for trouble.

You need to do RAID-10. EBS volumes CAN and DO fail.