How can an EBS volume that is currently attached to an EC2 instance be migrated from one Availability Zone to another?
Simply create a new volume in the other AZ and specify the original volume as the source.
Detach the volume, then use the ec2-migrate-volume command to move it to another AZ.
Create a snapshot of the volume, and create a new volume from the snapshot in the other AZ.
Detach the volume and attach it to another EC2 instance in the other AZ.
Explanations:
EBS volumes cannot be directly migrated by creating a new volume and specifying the original volume as the source. A new volume must be created from a snapshot.
Theec2-migrate-volumecommand does not exist. The migration of EBS volumes between Availability Zones requires a snapshot and then creating a new volume.
The correct method is to create a snapshot of the original volume and then create a new volume from that snapshot in the desired Availability Zone.
Detaching the volume and attaching it to another EC2 instance in a different AZ is not possible, as EBS volumes cannot be moved directly between AZs.
I reckon the answer is:
Create a snapshot of the volume, and create a new volume from the snapshot in the other AZ.