Volumes are designed to be highly available and reliable. At no additional cost to you, data is replicated automatically within the region on multiple storage servers, increasing data durability and fault tolerance.
Block storage is suitable for workloads that require strong consistency, such as file systems and databases. They are presented to the operating system as a disk volume that can be formatted with your preferred file system or used as a raw block device. It also allows you to snapshot volumes to create point-in-time images of your volumes.