Amazon EBS announces CloudWatch metrics with 1-minute granularity on all EBS volume types

We are excited to announce that all Amazon Elastic Block Store (Amazon EBS) volume types now receive CloudWatch metrics with 1-minute granularity at no additional cost. You can use CloudWatch metrics to monitor the performance and status of your Amazon EBS volumes. Additionally, you can use CloudWatch alarms to automatically perform actions or send SNS Topics based on CloudWatch Metrics.

Source:: Amazon AWS