Amazon’s Elastic Block Store explained � RightScale Blog
Now that Amazon’s Elastic Block Store is live I thought it’d be helpful to explain all the ins and outs as well as how to use them. The official information about EBS is found on the AWS site, I’ve written about the significance of EBS before and I’ll follow-up with a post about some new use-cases it enables.
The Basics
EBS starts out really simple: you create a volume from 1GB to 1TB in size and then you mount it on a device (like /dev/sdj) on an instance, format it, and off you go. Later you can detach it, let it sit for a while, and then reattach it to a different instance. You can also snapshot the volume at any time to S3, and if you want to restore your snapshot you can create a fresh volume from the snapshot. Sounds simple, eh? It is but the devil is in the detail!
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