# Docker-thinpool not mounted

**URL:** <https://forums.docker.com/t/docker-thinpool-not-mounted/41589>\
**Category:** General\
**Tags:** docker\
**Created:** [November 19, 2017, 9:19am UTC](https://forums.docker.com/t/docker-thinpool-not-mounted/41589 "2017-11-19T09:19:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![speedflyer](https://avatars.discourse-cdn.com/v4/letter/s/d6d6ee/32.png) [@speedflyer](https://forums.docker.com/u/speedflyer)\
**Post date:** [November 19, 2017, 9:19am UTC](https://forums.docker.com/t/docker-thinpool-not-mounted/41589/1 "2017-11-19T09:19:57Z")

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Hello,

I followed the tutorial here:

> **[Use the Device Mapper storage driver](https://docs.docker.com/engine/userguide/storagedriver/device-mapper-driver/#configure-direct-lvm-mode-for-production)**
>
> Device Mapper is a kernel-based framework that underpins many advanced volume management technologies on Linux. Docker’s devicemapper storage driver leverages the thin provisioning and snapshotting capabilities of this framework for...

By doing:

```auto
[root@master ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 100G 0 disk
└─sda1 8:1 0 100G 0 part /
sdb 8:16 0 100G 0 disk
└─sdb1 8:17 0 100G 0 part
  ├─docker-thinpool_tmeta 253:0 0 1020M 0 lvm
  │ └─docker-thinpool 253:2 0 95G 0 lvm
  └─docker-thinpool_tdata 253:1 0 95G 0 lvm
    └─docker-thinpool 253:2 0 95G 0 lvm

[root@master ~]# lvs /dev/docker/thinpool
  LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
  thinpool docker twi-a-t--- <95.00g 0.04 0.01

[root@master ~]# docker info | grep thinpool
 Pool Name: docker-thinpool

[root@master ~]# sudo ls -lh /var/lib/docker/devicemapper/
total 8.0K
drwx------ 2 root root 4.0K Oct 25 18:03 metadata
drwxr-xr-x 5 root root 4.0K Oct 25 18:03 mnt

[root@master ~]# sudo ls -lh /dev/mapper
total 0
crw------- 1 root root 10, 236 Oct 25 18:03 control
lrwxrwxrwx 1 root root 7 Oct 25 18:03 docker-thinpool -> ../dm-2
lrwxrwxrwx 1 root root 7 Oct 25 18:03 docker-thinpool_tdata -> ../dm-1
lrwxrwxrwx 1 root root 7 Oct 25 18:03 docker-thinpool_tmeta -> ../dm-0

```

However when I do :

```auto
 mount |grep devicemapper

```

I get nothing. Do you know where it should be mounted?

---

<div class="post-metadata">

**Author:** ![killerpapy](https://avatars.discourse-cdn.com/v4/letter/k/3d9bf3/32.png) [@killerpapy](https://forums.docker.com/u/killerpapy)\
**Post date:** [January 5, 2018, 9:54am UTC](https://forums.docker.com/t/docker-thinpool-not-mounted/41589/2 "2018-01-05T09:54:18Z")

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Hello,

I have the same problem.

Have you found a solution ?

Thank you.  
Regards,  
Killerpapy.