Initializing Amazon EBS volumes from snapshots involves bringing data from Amazon S3 and writing it to the volume, which initially can lead to higher I/O latency. For volumes that demand immediate high performance, you can force immediate initialization or enable fast snapshot restore, ensuring the volume performs optimally from the start. For Linux, use commands like dd or fio to read all blocks from the device, while on Windows, the process involves similar utilities. Proper initialization ensures the volume delivers its expected performance right away.
For more details, you can refer to the complete AWS documentation here.
https://docs.aws.amazon.com/ebs/latest/userguide/ebs-initialize.html
