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wiki.mbirth.de/know-how/software/openwrt/_posts/2014-05-26-sysupgrade-with-extroot.md

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---
title: OpenWRT sysupgrade with ExtRoot
layout: default
created: 2014-05-26 22:30:20 +0200
updated: 2014-05-26 22:47:49 +0200
toc: false
tags:
- know-how
- software
- openwrt
---
Run `sysupgrade` or upload the new file with LuCI.
<p><div class="noteimportant" markdown="1">
When upgrading with ExtRoot mounted, your configuration in ExtRoot will be saved and **restored to the `overlay` in
Flash memory**. So if you have a specific emergency configuration, be sure to boot without ExtRoot before starting the
upgrade.
</div></p>
After the reboot, you will be in the base system (that is, your configuration, but without ExtRoot). Run these commands
to get back on track:
opkg update
opkg install block-mount
opkg install kmod-fs-ext4
opkg install kmod-usb-storage
mount /dev/sda1 /mnt
rm /mnt/etc/.extroot-uuid
reboot
After this reboot, either everything will be working again (/dev/sda1 mounted to `/overlay`) or - if there was a new
kernel in that upgrade - /dev/sda1 might be mounted to `/overlay-disabled`. In that case, you have to recreate ExtRoot
(save your configuration first).
If your previous ExtRoot mounted fine, you might want to update your packages there. It is important to **NOT** upgrade
kernel modules as this might break things. The [ExtRoot Wiki Page](http://wiki.openwrt.org/doc/howto/extroot#old.notes)
lists a command to only update non-kernel-packages:
opkg upgrade $(opkg list-upgradable | awk '($1 !~ "^kmod|Multiple") {print $1}')