# How do I attach different volume to instance via Docker Machine API?

**URL:** <https://forums.docker.com/t/how-do-i-attach-different-volume-to-instance-via-docker-machine-api/101054>\
**Category:** General\
**Tags:** aws, docker\
**Created:** [November 27, 2020, 5:08pm UTC](https://forums.docker.com/t/how-do-i-attach-different-volume-to-instance-via-docker-machine-api/101054 "2020-11-27T17:08:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![marklovespython](https://avatars.discourse-cdn.com/v4/letter/m/b38774/32.png) [@marklovespython](https://forums.docker.com/u/marklovespython)\
**Post date:** [November 27, 2020, 5:08pm UTC](https://forums.docker.com/t/how-do-i-attach-different-volume-to-instance-via-docker-machine-api/101054/1 "2020-11-27T17:08:46Z")

</div>

### Expected behavior

Created EC2 instance with “io1” type volume (100GB)

### Actual behavior

Throws error saying additional `iops` argument is missing.

### Additional Information

How developers attach different (besides “gp2”) volume to EC2 instance using Docker Machine API ? Given that they also use Docker Machine with docker compose to create containers ?

The docs say developer can use `--volume-type "io1"` but if you can’t supply the additional required argument `iops` that makes the flag little bit useless.

How developers go about this ?

### Steps to reproduce the behavior

1. Install Docker Machine for Linux
2. run `docker-machine create -d amazonec2 --volume-type "io1" [instance_name]`