I just flashed my TP-Link TL-MR3020 successfully with Chaos Calmer 15.05.1

as I want to install OpenVPN and there is not enough space, I wanted to use extroot (pivot-root) on a usb stick.
The packages to be installed upfront are:
- block-mount
- kmod-fs-ext4
- kmod-usb-storage-extras

but I don't even have enough space to install these packages!!!

root@OpenWrt:~# opkg install kmod-fs-ext4
Installing kmod-fs-ext4 (3.18.23-1) to root...
Collected errors:
 * verify_pkg_installable: Only have 132kb available on filesystem /overlay, pkg kmod-fs-ext4 needs 221
 * opkg_install_cmd: Cannot install package kmod-fs-ext4.

Any way to (at least temporarily) free up some kB to be able set up extroot?

thanks michael

after flashing: 300kb available
then I enable wifi, to access the internet: 296kb available
"opkg update": 296kb available
"opkg install kmod-fs-ext4": 40kb available
neither "block-mount" nor "kmod-usb-storage-extras" can be installed after kmod-fs-ext4 ...

Taking a precompiled image and installing the necessary packages afterwards doesn't work on the MR3020. Instead, you have to compile your own image which includes the needed packages.

See also https://lede-project.org/faq/before_ins … save_space

thanks - I will immediately look into this!

But are there any specifics to the MR-3020 image (like LEDs, button, switch etc) I have to take care for during creating the image?
or can I customize this afterwards?

make menuconfig -> then look at target/subtarget. There should be your device type. Will take care of LEDs etc.

Hi,
I've installed Openwrt on TL-MR3020 every thing is OK, the only issue is insuffisant memory to add some packages (barely 300 Kb):

Q1-While it has 4Mb of Flash and 32Mb of RAM where does the 300 kb come from (Flash or RAM)?
Q2- i've seen some memory upgrade (RAM replacement) for other routers online, are all RAM memories with 54 pins compatible (even from différents manufacturers) or should i verify something before replacement ?
Thanx a lot

Could you solve the problem, endly? I have the same problem. Thanks

(Last edited by jbtorras on 30 Aug 2017, 19:26)

Same problem, same solution, see above.

In the end, 4/32MB devices are a PITA.

See also:
https://lede-project.org/meta/infobox/432_warning
https://lede-project.org/faq/before_ins … save_space