Booting from External Storage

It worked fine when I did it before upgrading to OpenWRT18.

After upgrading to OpenWRT18, I had to do it again, and I followed the same instructions, precisely, as far as I can tell.

However, after rebooting, this file:

/etc/config/fstab

reverts to what it was initially, even though I edited it as the last step before rebooting (and I checked, it is being saved properly before I reboot).

After rebooting, the file system looks exactly as it did before I started:

Filesystem                Size      Used Available Use% Mounted on
/dev/root                 7.8M      7.8M         0 100% /rom
tmpfs                    29.3M     84.0K     29.2M   0% /tmp
/dev/mtdblock6            6.6M      6.6M         0 100% /overlay
tmpfs                    29.3M    116.0K     29.2M   0% /tmp/root
overlayfs:/tmp/root      29.3M    116.0K     29.2M   0% /
tmpfs                   512.0K         0    512.0K   0% /dev
/dev/mmcblk0p1           14.5G     40.0M     13.7G   0% /mnt/mmcblk0p1

And the relevant part of /etc/config/fstab goes back to what it was before I edited. Before rebooting, I changed it to this:

config mount
        option target '/overlay'
        option uuid 'c4f1e098-785d-412a-af16-491e184650ff'
        option enabled '1'

But after rebooting, it goes back to:

config mount
        option target '/mnt/mmcblk0p1'
        option uuid 'c4f1e098-785d-412a-af16-491e184650ff'
        option enabled '0'

Anyone know why it keeps reverting to what it was before I reboot? I want to install Node but I can't because there is not enough space. My 2+ is useless without more space.

I reformatted the drive so now it only has one partition (and the device name is now mmcblk0), but the end result is the same, once I reboot, /etc/config/fstab is reset to what it was before I edited it.

I did notice this during the boot process:

[   15.408335] block: attempting to load /etc/config/fstab
[   15.415885] block: unable to load configuration (fstab: Entry not found)
[   15.422871] block: no usable configuration

...but I don't know if that is significant. /etc/config/fstab does exist once the device has booted, but it still contains what I pasted above.

1. Installed new firmware 0.3.2 b217 -> oupgrade -latest
2. Copied the overlay folder per the instruction found here onto my SD Card
3. Created my /etc/config/fstab file and made necessary changes per link here.
4. Rebooted - no love as I mentioned. So onto the hack...
5. Downloaded the prior build b202 and installed it via my USB using the Expansion Dock and Putty per instruction here. You may be able to do the firmware update using ssh but I had already had the system setup for unbricking my processor from earlier so I stuck with it.
6. Rebooted
7. Created my /etc/config/fstab again using block > /etc/config/fstab and made the necessary changes per link here.
8. Rebooted NOTE: I did not copy back over the overlays folder as that would have put the older firmware onto the SD Card.
9. upon reboot I have my 116.GB Card with 110GB of space WOOT!
   
   Now time to play with Node and SQLite... Enjoy

ubus call system board

Yeah it as I suspected after trying to install the underlying system still is not updated as it would not allow me to install packages that are part of the 18.06 Snapshot. I kept getting "Signature check failed". So back to square one....
{
"kernel": "4.4.74",
"hostname": "Omega-XXXX",
"system": "MediaTek MT7688 ver:1 eco:2",
"model": "Onion Omega2+",
"board_name": "omega2p",
"release": {
"distribution": "LEDE",
"version": "17.01-SNAPSHOT",
"revision": "r3529-8d3b49a",
"codename": "reboot",
"target": "ramips/mt7688",
"description": "LEDE Reboot 17.01-SNAPSHOT r3529-8d3b49a"
}
}

so openwrt 18.06 is actually lede 17.01 snapshot? i guess it is some marketing mumbo jumbo.

No.
HW Omega2+ FW OpenWrt 18.06 based omega2p-v0.3.2-b217

BusyBox v1.28.3 () built-in shell (ash)

   ____       _             ____
  / __ \___  (_)__  ___    / __ \__ _  ___ ___ ____ _
 / /_/ / _ \/ / _ \/ _ \  / /_/ /  ' \/ -_) _ `/ _ `/
 \____/_//_/_/\___/_//_/  \____/_/_/_/\__/\_, /\_,_/
 W H A T  W I L L  Y O U  I N V E N T ?  /___/
 -----------------------------------------------------
   Ω-ware: 0.3.2 b217
 -----------------------------------------------------
root@Omega-5BE1:/# ubus call system board
{
	"kernel": "4.14.81",
	"hostname": "Omega-5BE1",
	"system": "MediaTek MT7688 ver:1 eco:2",
	"model": "Onion Omega2+",
	"board_name": "omega2p",
	"release": {
		"distribution": "OpenWrt",
		"version": "18.06-SNAPSHOT",
		"revision": "r0+7437-d624ea1daf",
		"target": "ramips\/mt76x8",
		"description": "OpenWrt 18.06-SNAPSHOT r0+7437-d624ea1daf"
	}
}

root@Omega-5BE1:/# onion os version
=== Version Info ===
Omega firmware: v0.3.2 b217
onion-os - 1.0.6-1

root@Omega-5BE1:/# uname -a
Linux Omega-5BE1 4.14.81 #0 Thu Feb 21 20:59:23 2019 mips GNU/Linux

It seems it is not yet fully perfect. It's rather a release candidate.

Again just a hack till someone way smarter than me figures out how to get the 18.06 base system to boot from external devices.

Anyone know if there will be an update to let us boot from an external device with OpenWRT18?

opkg update
opkg install kmod-usb-storage-extras e2fsprogs kmod-fs-ext4 block-mount

umount /tmp/mounts/SD-P1
echo -e "y" | (mkfs.ext4 /dev/mmcblk0p1)

mkdir /mnt/mmcblk0p1
mount /dev/mmcblk0p1 /mnt/mmcblk0p1
block detect > /etc/config/fstab
uci set fstab.@mount[0].target=/overlay
uci set fstab.@mount[0].enabled=1
uci commit
mount /dev/mmcblk0p1 /mnt/ ; tar -C /overlay -cvf - . | tar -C /mnt/ -xf - ; umount /mnt/

then

reboot now & exit

log back in and check

df -h. 

What is the command you are using to try and set up you swap file?