# / mounted on tmpfs

**URL:** <https://forums.docker.com/t/mounted-on-tmpfs/2794>\
**Category:** Boot2Docker\
**Created:** [August 11, 2015, 7:35am UTC](https://forums.docker.com/t/mounted-on-tmpfs/2794 "2015-08-11T07:35:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ducatel](https://sea3.discourse-cdn.com/docker/user_avatar/forums.docker.com/ducatel/32/1283_2.png) [@ducatel](https://forums.docker.com/u/ducatel)\
**Post date:** [August 11, 2015, 7:35am UTC](https://forums.docker.com/t/mounted-on-tmpfs/2794/1 "2015-08-11T07:35:30Z")

</div>

Hi all,

I have a problem with disk space on boot2docker.

In fact, I cannot add somes big files inside it because `/` is mounted on my RAM memory (tmpfs).  
Is it possible to mount automatically my `/dev/sda1` (20Go by default) on `/` instead of `/mnt/sda1` ?

So the view of my problem:

```auto
docker@boot2docker:~$ df -h
Filesystem Size Used Available Use% Mounted on
tmpfs 3.5G 106.4M 3.4G 3% / # Too small for my
tmpfs 1.9G 0 1.9G 0% /dev/shm
/dev/sda1 18.2G 59.9M 17.2G 0% /mnt/sda1 # should be mounted on / 
cgroup 1.9G 0 1.9G 0% /sys/fs/cgroup
none 476.9G 257.7G 219.3G 54% /c/Users
/dev/sda1 18.2G 59.9M 17.2G 0% /mnt/sda1/var/lib/docker/aufs

```

Thanks for your help.