Merge pull request #483 from bgdnlp/EFS-encryption

Note that EFS encryption is now available and small adjustments.

README.md

@@ -956,10 +956,9 @@ EFS
 ### EFS Basics
 
 -	📒 [Homepage](https://aws.amazon.com/efs/) ∙ [User guide](http://docs.aws.amazon.com/efs/latest/ug) ∙ [FAQ](https://aws.amazon.com/efs/faq/) ∙ [Pricing](https://aws.amazon.com/efs/pricing/)
--	🐥**EFS** is Amazon’s new (general release 2016) network filesystem.
+-	🐥**EFS** is Amazon’s network filesystem. It’s presented as an [NFSv4.1](https://en.wikipedia.org/wiki/Network_File_System#NFSv4) server. Any compatible NFSv4 client can mount it.
 -	It is designed to be highly available and durable and each EFS file system object is redundantly stored across multiple availability zones.
 -	EFS is designed to be used as a shared network drive and it can automatically scale up to petabytes of stored data and thousands of instances attached to it.
--	It’s presented as an [NFSv4.1](https://en.wikipedia.org/wiki/Network_File_System#NFSv4) server, so any compatible NFS client can mount it.
 -	EFS can offer [higher throughput](http://docs.aws.amazon.com/efs/latest/ug/performance.html) (multiple gigabytes per second) and better durability and availability than EBS (see [the comparison table](#storage-durability-availability-and-price)), but with higher latency.
 -	EFS is priced based on the volume of data stored, and costs [much more than EBS](#storage-durability-availability-and-price); it's in the ballpark of three times as much compared to general purpose gp2 EBS volumes.
 -	⏱ [Performance](http://docs.aws.amazon.com/efs/latest/ug/performance.html) is dependent on the volume of data stored, as is the price:
@@ -984,7 +983,7 @@ EFS
 ### EFS Gotchas and Limitations
 
 -	🔸 A number of NFSv4.1 features are [not supported](http://docs.aws.amazon.com/efs/latest/ug/nfs4-unsupported-features.html) and there are some [limits](http://docs.aws.amazon.com/efs/latest/ug/limits.html) to the service.
--	🔸 As of 2017-02, EFS does not offer disk level encryption, though it is on the roadmap.
+-	🔸 As of 2017-08, EFS offers disk level encryption for new drives. For file systems created before that date, encryption can only be achieved by moving the data to a new EFS volume.
 -	🔸 An EFS file system [can be mounted on premises](https://aws.amazon.com/efs/faq/#on-premises) over Direct Connect.
 -	🔸 An EFS file system can NOT be mounted over VPC peering or VPN, even if the VPN is running on top of Direct Connect.
 -	🔸 Using an EFS volume on Windows is not supported.