How to do it...

1. Create a volume:

      aws ec2 create-volume --availability-zone us-east-1a

Take note of the returned VolumeId in the response. It will start with vol- followed by alphanumeric characters.

2. Attach the volume to the instance, using the volume ID noted in the last step and the instance ID you started with:

      aws ec2 attach-volume \
        --volume-id <your-volume-id> \
        --instance-id <your-instance-id> \
        --device /dev/sdf

3. On the instance itself, mount the volume device:

      mount /dev/xvdf /mnt/volume