Encryption header damaged/missing


#1

After my latest backup copying from my local to my offsite storage failed with the error “Failed to decrypt the chunk : The storage doesn’t seem to be encrypted”. Both the local and offsite storage are encrypted.
After further inspection I found out that the chunk was added during the latest backup to my local storage, so I could “fix” the error by pruning the latest revision on my local storage and repeating the backup and copy operations.
I would however like to find out how this could happen. Does anybody have an idea what could have caused this? And would there have been a fix which doesn’t involve deleting the whole last revision?


#2

What is the first 9 bytes of that chunk file? It has to be duplicacy for the file to be considered a valid chunk file.


#3

Unfortunately I can’t check that anymore, because I pruned the latest backup and the failing chunk was deleted


#4

Don’t you have a “trash” or “deleted” folder in the webui of your storage provider?


#5

It didn‘t get uploaded to my online storage provider because of the error and did get deleted on my local backup drive by pruning the latest revision