Rollback from DSM 6.2.1-23824 to DSM 6.2-23739 Update 2

[dutchnas]

Today I've tried to upgrade my HP N40L Microserver but the onboard nic won't work anymore.

I want to rollback to DSM 6.2-23739 Update 2.

I've tried the following; 

Flashed my USB with the latest bootloader 1.03b and starter the NAS.

The NAS is reachable but only has the recovery option, but after the recovery the nic isn't reachable again.

 

How can I force the install to use  DSM 6.2.1-23824, and hopefully without any data loss only config loss.

[luchuma]

there is instruction in

 

[dutchnas]

28 minutes ago, luchuma said:

there is instruction in

 

 

But I don't understand that one for now, I need to use the zImage, extra.gz and rd.gz from another image but which one? 

 

How to downgrade:

Replace zImage, extra.gz and rd.gz (open synology.img -> image.img with 7Zip) with the one from DS3615xs (use the opposite of what you have installed currently) so you will force a reinstall of DSM. You cannot migrate the settings, so you have to do a clean install (keeps your data). Afterwards replace the above files again with your original bootloader, for me its DS3617xs and do a fresh install again.

[luchuma]

(use the opposite of what you have installed currently)

so if you have loader for 3617 then use files from 3615 and if loader is 3615 then use files from 3617

[dutchnas]

That was the trick, thank you! 😀

[chipped]

Thanks for the tip guys. Saved my bacon today too

[Lillzo]

On 10/10/2018 at 5:33 PM, chipped said:

Thanks for the tip guys. Saved my bacon today too

it is not clear to me what the process is:

-change the above mentioned 3 files on the already prepared USB stick? What pat file do you use then?

-or you change them in the PAT file?

 

Thanks.

[chipped]

14 hours ago, Lillzo said:

it is not clear to me what the process is:

-change the above mentioned 3 files on the already prepared USB stick? What pat file do you use then?

-or you change them in the PAT file?

 

Thanks.

How to downgrade:

Replace zImage, extra.gz and rd.gz (open synology.img -> image.img with 7Zip) with the one from DS3615xs (use the opposite of what you have installed currently) so you will force a reinstall of DSM.

 

You cannot migrate the settings, so you have to do a clean install (keeps your data). Afterwards replace the above files again with your original bootloader, for me its DS3617xs and do a fresh install again.

 

What this means is, if you have 3617, then download the 3615 loader. Extract the files above using 7zip from the 3615 loader, use OSFMount to modify the 3617 with those files (by replacing them) and then make a USB with this modified 3617 loader.

[chipped]

Let me know if you have trouble and don't understand the instructions. I was a bit vague, they're personal notes I made for myself.

[epicurean]

On 11/2/2018 at 6:16 PM, chipped said:

How to downgrade:

Replace zImage, extra.gz and rd.gz (open synology.img -> image.img with 7Zip) with the one from DS3615xs (use the opposite of what you have installed currently) so you will force a reinstall of DSM.

 

You cannot migrate the settings, so you have to do a clean install (keeps your data). Afterwards replace the above files again with your original bootloader, for me its DS3617xs and do a fresh install again.

 

What this means is, if you have 3617, then download the 3615 loader. Extract the files above using 7zip from the 3615 loader, use OSFMount to modify the 3617 with those files (by replacing them) and then make a USB with this modified 3617 loader.

Hi, 

Do you mean to extract synoboot.img, take the image.img from there, and then remove the zimage, extra.lzma and rd.gz ? Can we just take the image.img file from one loader to replaced in the other loader?