Issue with Bitcoin Core Wallet after power outage

Hey everyone! So, I had a problem with Bitcoin Core after a power outage. When the power went out, I installed the drive on "D" and the blockchain was running on "E". I managed to get the full blockchain running again, but the drive letters flipped around after restarting "E" became "D" and vice versa. I got a message from Bitcoin Core saying: Wallet.dat is saved, but my backup is named Wallet.datxyz.bak. That’s all fine, but now that I want to open my wallet in the new synchronized Bitcoin Core client, it’s asking me for the wallet name. I can’t remember what the wallet name was, but I do know the password. I tried renaming Wallet.datxyz.bak to Wallet.dat, but I got a wallet name error... We have the entire folder backed up, etc. How can I find out what the wallet name was? I was using Bitcoin Core 21 on Windows at that time, but now I'm on Linux with Bitcoin Core 29. Oh, and my balance is 0.007 BTC, and I'm willing to share 50% of it for any help!

Suggestion: re-read everything you wrote, remove irrelevant bits, and make sure the reader can understand it. Now it's a story about old Windows disk names, a wallet named wallet.dat but you don't know the name, and a newer Linux where you don't know the name of your wallet. This makes it very hard to help you. You should read [READ BEFORE POSTING] Tech Support Help Request Format.

OP, it seems you used AI or automated service to perform english translation where the result is poor. I would recommend you to visit one of local board on this forum where you can use your native language, so you could get better response. Drive "D" and "E" imply you use Windows, but you also mention you use linux.

Hi everyone, Back in 2021 I was running Bitcoin Core 21 on Windows. After a crash/power issue, Bitcoin Core automatically renamed my wallet file from wallet.dat to wallet.dat123456.bak. I copied that file to a USB drive at the time. Now I am using Linux with Bitcoin Core 29, and I would like to restore this wallet. I know the password, but I am not sure about the following: Does the version difference (21 → 29) matter when restoring the wallet? How can I use/rename the wallet.datxxx.bak file so that Bitcoin Core recognizes it again? The new client asks for a wallet name. How can I find out what the original wallet name was back in 2021? For safety: I will not share my wallet.dat file with anyone, I only need instructions. The balance should be around 0.007 BTC. Any guidance would be really appreciated. Thanks in advance! Sorry, my English is not very strong. Back in 2021, on Windows with Bitcoin Core 21, the program crashed and automatically renamed my wallet file from wallet.dat to wallet.dat534532.bak. I copied this file to a USB drive at the time. Now I’m running Linux. How can I restore this wallet file? Does the Bitcoin Core version matter in this case?

Not at the moment. It'll just warn you that it'll soon be deprecated in the future versions. For v29.x, it'll still accept your legacy wallet.dat file. You're already on the "name" part, so I guess you've used Restore and the wallet backup is accepted. As for the name, it's not asking for the original wallet name but your preferred name of the wallet once restored. And your backup wont be modified by Restore, it will simply copy it to your "wallets" directory. Now, reply if you encounter an error after that because it means that there's something wrong with it when Bitcoin Core tried to load the restored wallet.

Hy . Okay, I will try restoring the wallet.datxxxxx.bak file by renaming it to wallet.dat as you described. big thanks

Hmm weird, I assumed that you already renamed it. And I didn't mentioned to rename the wallet backup since you already got to the point where Bitcoin Core is asking for a wallet name. Because your earlier post suggests that you already got past that renaming part and managed to load it via Restore option.

Yes, earlier I renamed a copy, but it ended in failure after I tried to restore it. I became completely clueless, and that’s why I created this post—because I need more precise help. I still have the wallet.datxxxx.bak file with the .bak extension. I tried to follow the instructions, but Bitcoin Core runs into an error. Right now, I have a copy renamed as wallet.dat, but I can’t restore it. In addition, I still have the .datxxxx.bak file that was created by Bitcoin Core in 2021. It may sound ridiculous, but I’m unable to restore it.

And what does the error said? It could be vague sometimes but the error should be able to point you to the issue. For example: if it says "Data is not in recognized format", the wallet.dat may be corrupted but it doesn't tell if the keys in it are damaged. That case might be solved by using "salvage" command of Core's bitcoin-wallet tool if the wallet has intact keys. Note: if you're going to research how to do that method, please use a copy of your wallet.dat file and not the main backup.