[Tutorial: How to downgrade from 6.2 to 6.1 - Recovering a bricked system]

On 4/12/2019 at 2:22 PM, argate7 said:

I have the same problem with yours.

 

How did you managed to get all your data.

 

What is my case?

I had two hdds with data. The one was used to contain both the OS and some data. The other was used to contain personal data.

I'm using as suggested a blank hdd.

When i connect the blank and the hdd with personal data, i can see the contents of the hdd data.

 When i connect back the hdd with the old OS, i'm getting the recover process and after that the DSM is not working and is not accessible from the lan.

 

All the hdds you plug on the XPE contain OS data.  The reason why you can't boot up your XPE is that the update operation writed the wrong OS data on the hdds.