# ZRAM not found in modules.dep

**URL:** <https://forums.suse.com/t/zram-not-found-in-modules-dep/5601>\
**Category:** RancherOS\
**Created:** [February 20, 2017, 5:37pm UTC](https://forums.suse.com/t/zram-not-found-in-modules-dep/5601 "2017-02-20T17:37:36Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![frimdo](https://avatars.discourse-cdn.com/v4/letter/f/cdc98d/32.png) [@frimdo](https://forums.suse.com/u/frimdo)\
**Post date:** [February 20, 2017, 5:37pm UTC](https://forums.suse.com/t/zram-not-found-in-modules-dep/5601/1 "2017-02-20T17:37:36Z")

</div>

How to enable ZRAM?

```auto
$ modprobe zram
modprobe: module zram not found in modules.dep"

```

Am I doing something wrong?

---

<div class="post-metadata">

**Author:** ![SvenDowideit](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/svendowideit/32/2159_2.png) [@SvenDowideit](https://forums.suse.com/u/SvenDowideit)\
**Post date:** [February 22, 2017, 5:54pm UTC](https://forums.suse.com/t/zram-not-found-in-modules-dep/5601/2 "2017-02-22T17:54:24Z")

</div>

most of the optional modules are in the `kernel-extras` service - which you need to enable & start:

```auto
[root@rancher-dev rancher]# ros service enable kernel-extras
Pulling kernel-extras (rancher/os-extras:4.9.10-rancher)...
4.9.10-rancher: Pulling from rancher/os-extras
b7f33cc0b48e: Pull complete
6ed9e06ced7b: Pull complete
f4d1700b2dc9: Pull complete
88a3aa0acbbc: Pull complete
Digest: sha256:4182efdcf0b9f6ff444b9105d320537237b9d7f828284e2b8ba6efb93b398fd9
Status: Downloaded newer image for rancher/os-extras:4.9.10-rancher
[root@rancher-dev rancher]# ros service up kernel-extras
> INFO[0000] Project [os]: Starting project
> INFO[0000] [0/17] [kernel-extras]: Starting
> INFO[0004] [1/17] [kernel-extras]: Started
> INFO[0004] Project [os]: Project started
[root@rancher-dev rancher]# modprobe zram
[root@rancher-dev rancher]# lsmod
Module Size Used by Not tainted
zram 28672 0
xfrm_user 28672 1
xfrm_algo 16384 1 xfrm_user

```