# Adding DAS to /etc/fstab

You may want to automatically mount your DAS during reboots (e.g., \`reboot\`, \`shutdown -r\`, \`systemctl reboot\`). In these cases, the host will not be released and your DAS will remain intact. However, for safety purposes we recommend using the following \`/etc/fstab\` entry.

<pre data-full-width="false"><code># device    mount                           fs-type      options                                       dump pass
<strong>/dev/vdc    /home/ubuntu/direct-attached    ext4         defaults,nofail,x-systemd.device-timeout=5    0    2
</strong></code></pre>

#### Explanation

* device -\`/dev/vdc\`
* mount - \`/home/ubuntu/direct-attached\` (example)
* fs-type - ext4 (example)
* options:
  * defaults - start with the filesystem defaults
  * **no-fail** - DAS volume cannot block system boot
  * **x-systemd.device-timeout=5** - only wait 5s on filesystem during boot
* dump (0) - do not run backup
* pass (2) - run fsck after boot

The **\`no-fail\`** and **\`x-systemd.device-timeout=5\`** options are particularly important since stopping and restarting a VM on another host would cause mounting the DAS to fail and block the VM boot process.  Make sure not to set the timeout to 0, as this translates to infinite timeout.

#### Tip

To validate your \`/etc/fstab\` changes run a \`mount -a\` before trying a reboot.