Debian cannot boot on KD20 after flashing u-boot

Bodhi,

Quote
Bodhi

Plug in a USB thumb drive, and at serial console prompt,

usb reset
ext2ls usb 0:1 /


If you can see the USB drive top directory listing from these commands, then it is OK to use USB rootfs. And that is my example above for:

I tried these commands on the serial console, but did not get any response that looked like a USB device being recognized.
I am not certain about it, but I can only explain this that the stock SPL/U-boot combo has no code in it to handle USB devices in this stage yet. Only when a kernel is loaded I do see USB devices being recognized.

In the mean time I also installed Owncloud10 on this box to see if the extra memory would result in better performance because less swapping would be necessary. Unfortunately this was hardly the case. For example the feature of OC10 to generate thumbnails appeared to be so demanding on the cpu that less swapping did not make much difference. I suppose that the calculation power needed for this OC10 feature is just to much asked for a platform without hardware floating point unit.
With up- or downloading files there is no performance problem, but that was already OK on a Pogoplug.

I think I leave the USB booting for now, because being able to boot from a USB device was a ´nice to have´ feature. Even more so because using a SATA disk provides a much better data throughput then any USB device ever. So actually there is no urgent need for being able to boot from USB.

Thanks for all your assistance in this case to revert the mess that I had created myself because I had no idea of the intricate details involved with u-boot SPL etc.

I learned a lot from this:)

Maybe I can write a wiki how to have a Shuttle kd20 to boot from a regular SATA disk with just some modifications of the u-boot environment. Actually it is just what I have written here: https://forum.doozan.com/read.php?2,105494,106104#msg-106104
However doing that could be difficult without having a serial interface available.

hacksome

hacksome,

There is no need to figure out the USB booting, other than it could be used as a rescue system to boot the box when your HDD rootfs is bad.

-bodhi
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Hi Hacksome and Bodhi,

I do not want to hijack this thread but this is the latest activity on the KD20 I could find.

I'm having a hard time disassembling the device and the pictures that are referenced are not available anymore since Google+ is down.

Could you provide me with some pointers on how to get the device open to connect to the serial console?

Christiaan

Christiaan,

I don't have this device, so Hacksome will help you.

-bodhi
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Christiaan Wrote:
>
> I'm having a hard time disassembling the device
> and the pictures that are referenced are not
> available anymore since Google+ is down.
>
> Could you provide me with some pointers on how to
> get the device open to connect to the serial
> console?

You must pry the white plastic right side of the device from the aluminum. I started by opening the door and then carefully using a plastic opening tool there are 4 tabs on the top and 4 on the bottom of the right side. Two screws then need to be removed to take off the plastic front. This exposes 2 screws near the aluminum side which need to be removed. Then 2 additional screws at the rear near the aluminum side allow you to remove the cage from the aluminum base. You should be able to then see how to gain access to the circuit board.

Ray

Thanks, I've succesfully opened the device. The white plastic was also stuck at the front and back but going around all the sides with a plastic card unlocked all hooks.

Edit: also, apparently I've blown up the board when somehow the power plug short-circuited when plugging it into the wall outlet. Hopefully someone else that finds this on Google still finds use for the instructions ;)



Edited 2 time(s). Last edit at 12/27/2020 11:31AM by Christiaan.

Hello,

Does anyone still have KD20.zip file available here? Google does not find it any more.

WBR: Harri

Seeing how recent this thread is, I wanted to ask about recovering a KD20 from a red power LED - a couple years ago while upgrading to OpenWRT I managed to corrupt the firmware.

Recently I tried to break into it through the internal serial port and an FTDI232. I see activity on the converter on one LED, but there's no response from the NAS. It was suggested that I might be able to install a boot loader on the HDD and recover things that way.

This is all new territory for me - suggestions?

Thanx.

TechGuy,

See the Wiki thread

Quote

Booting Debian on Pogoplug

....
How to boot Pogo V3 from SATA (to unbrick), 2nd How to Post
....

That SATA booting tutorial should work for all OXNAS SoC boxes. The 2nd howto is a bit more refined, so use it first.

-bodhi
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Edited 1 time(s). Last edit at 12/06/2022 05:07PM by bodhi.

Many thanks, I'll give that a go.

So, I gather that the ox820-sata-uboot.tar.gz file can be used as is for the KD20?
It was not easy to find ...

Thanks.

TechGuy,

These boxes can run the same kernel, since they have the exact same SoC:

ox820-pogoplug-pro.dtb
ox820-kd20.dtb
ox820-akitio.dtb
ox820-pogoplug-classic.dtb
ox820-stg212.dtb

OTOH, the new u-boot was developed mainly for the Pogoplug V3 OXNAS boxes (Pro and Classic).

Each stock u-boot (even coming from the same source code) could be tweaked slightly by the box manufacturer. So that same u-boot woorking fine for the Pogoplug V3, might have problem booting other boxes. You just have to try.

-bodhi
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