Corrupted database? · Issue #2305 · bitcoin/bitcoin · GitHub

Issues with bitcoin-qt

I know this is frequently posted, but I'm incensed at how absurdly slow reindexing becomes. There's got to be something wrong with the sync mechanism.
I was 100% synced a week ago on my MacBook Pro. Latest version of the client (v0.17.0.1). I rsync'd the whole bitcoin dir (blocks, chainstate, index, etc) to another disk, ran a node on another machine using that copy for a couple of hours, then I stopped the node and rsync'd back to the Mac.
Bitcoin-qt did not like the updated blockchain. The other machine didn't like its blockchain either. Oh well, I thought, maybe it didn't shutdown properly and borked the last block. I'll let it reindex, in a few minutes it'll be grand.
But no. Bitcoin-qt decided that it was time to start over from scratch, ignoring the flawless 99.999% of data on disk. Yay.
That was 10 days ago. At one point several days ago it was about 3 hours from finishing, with a progress of around 19% per hour. A day later progress was at 0.25%. This can't be right, I thought, maybe there's a bug, a memory leak or something. I'll shut it down and restart it. Of course it's going to restart from where it left, right? Right?
No. It started from 0% again.
Several days later, it's at 0.14% and predicting it'll finish sometime next week. CPU is 96% idle, RAM is at 25%, bandwidth is 120 Mb/s and the disk is used by bitcoin-qt and nothing else. It's the only thing running on this Mac and has been for the past two weeks. NOTHING is different between 19% and 0.14% in terms of bandwidth, CPU, RAM, or disk I/O. This very machine, under the exact same conditions, was able to process 19% of the blockchain in one hour.
In the meantime, I can't move my BTC because my wallet, which has all the blocks including the ones containing the transactions with my BTC in them, doesn't believe the blocks are there.
Bitcoin-qt is broken in more ways than one. First, something is causing this absurd variation in performance. Second, it's not saving state, which is particularly painful when it takes ages to get to the end to the blockchain. Is state only kept in RAM? I've seen other threads suggesting a change in the config (dbcache seems to be the main one), but I can't just change the setting without restarting, and restarting is not an option because I'll lose everything again.
Sorry, this is extremely frustrating. I'm thinking of extracting the private key and abandoning the idea of running my own wallet. It's unusable.
submitted by jungle to Bitcoin [link] [comments]

TECH HELP: Wallet conflict! Need help retrieving missing BTC from Bitcoin Core Qt wallet after trying to also install and sync BitcoinABC Qt wallet.

Hey guys,
It seems I'm one of those newbies who's dove into the pool before learning how to swim.
A couple of weeks ago I installed the Bitcoin Core wallet and deposited a small amount of BTC to get it off the exchange. After buying some BCH I decided to download ABC Qt wallet to store my BCH.
After installing and running ABC, I noticed the wallet had a transaction in its history showing the exact denomination I had deposited into my BTC wallet, but in BCH!!! (so not the same value) And it was already encrypted.
After waiting a night for it to sync with the network ('processing blocks on disk', and then 'reindexing blocks on disk') the syncing stalled at 81ish percent and I decided to give up on it. I closed the program and opened up the preexisting Bitcoin Core wallet to find that the value had dropped to 0, and it also could not connect to the network and has its network progress stuck at 81ish percent. There seems to be a conflict between the two that's causing the problem because the I was running a full node the the Bitcoin Core wallet which was 100 percent synced last night!
During installation, I noticed the ABC wallet had a transaction in its history showing the exact denomination I had deposited into my BTC wallet, but in BCH!!! (so not the same value)
It seems that the computer recognises the two programs as the same. And now the funds are stuck in limbo. How the hell can I resolve the issue to at least retrieve my funds?
I haven't deleted the ABC app yet in case that makes my funds irretrievable.
(fyi: using an MacBook Pro)
submitted by basedspaceman to btc [link] [comments]

need help. My wallet destroyed just now!

***Finally get back from An old .bak file. The .bak file today still can't open. No loss anyway
Thank you my friends.
However, I strongly urge Bitcoin foundation who maintains bitcoind improve its security greatly. It's not hard to solve if you see Bitcoin as money, as people's wealth.
Also, just now I sent the btc to my main wallet. and set the"change" to go to a coinbase address. But after being sent, I saw there is a remind "unknown address", and the 0.00xx btc now lies in the software. WTF?
Could you give users some better experience, Bitcoin Foundation? Bitcoin is no longer a toy, it's now money, you know? You need fear while dealing with things about money.
You can do much better.
Bitcoin as a science is perfect, But the related business/foundation as a technology don't deserve the honor. I know it feels cynicism. But they don't love & don't fear users.
Ok, it seems that I become the new victim of "salvaged fail". 15% of Life savings oh.
I no longer want to accuse Bitcoin foundation. They don't care, so do I.
The story: My laptop ran out of power while Bicoind was running. So the wallet corrupt for ever. Then I was so nervous that I copy another wallet.dat to make a backup without stopping bitcoind, then the 2nd wallet corrupt for ever.
I no longer, no longer want to accuse. i lost strength to accuse.
I ever thought 15% did not deserve to care enough, until one day I lost it.
Sorry, i am too sad
I use windows. SSD (macbook pro)
It seems the reason why this occured is that my laptop ran out of power while the bitcoind runing.
  1. I don't have any backup file.
  2. I have used this wallet.dat for more than one year. And in the past 5 months, I never use it.
  3. just now, I opened the bitcoind with the command -salvagewallet, and it says it needs to reindex, i choose "no". S it closed. And said “salvage failed"
  4. I saw the wallet.dat disappeared, and there appears a new file "wallet.*****(timestamp).bak", which I can't open.
I tried to relaunch bitcoind several times, with or without "-salvagewallet", every time failed.
I still have hope because One webpage I searched says "Warning: wallet.dat corrupt, data salvaged! Original wallet.dat saved as wallet.{timestamp}.bak in /root/.c-note; if your balance or transactions are incorrect you should restore from a backup."
But what I saw is "salvage failed", So I am a little nervous.
Shall I use the "-loadblock=wallet.14***(timestamp).bak" command? thanks
  1. So what can I do now to get my coins back?
is it able to get .dat from this new-generated .bak?thanks
thank you very much.
Anyone knows how to get bitcoin qt to recognise the presence of the corrupted wallet? thanks conf?
file unknown has LSN 1/263145, past end of log at 1/198476 Commonly caused by moving a database from one database environment to another without clearing the database LSNs, or by removing all of the log files from a database environment Page 0: metadata page corrupted Page 0: could not check metadata page wallet.dat: DB_VERIFY_BAD: Database verification failed file unknown has LSN 1/263145, past end of log at 1/199524 Commonly caused by moving a database from one database environment to another without clearing the database LSNs, or by removing all of the log files from a database environment wallet.1428881042.bak: DB_VERIFY_BAD: Database verification failed
submitted by binghamtonbitcoin to Bitcoin [link] [comments]

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###my bitcoin core say "syncing headers" and it totally stopped downloading blocks for more than 20 hours from then. this happened after 1/8 hard fork and after i set up the bitcoin ABC wallet 0.14.6, which i have removed. i tried many things and really confused now. all i want is to claim my bitcoin cash and move it to a market. please help me with this big thanks! : Bitcoin Reddit My Bitcoin Core wallet has been syncing for at least 6 hours now Extreme slow sync speed MacBook Pro 2.7GHZ · Issue #11725 Speed up your Bitcoin Core Wallet – Juke Says 5 Steps to Install Bitcoin-Qt Faster Bitcoin Core 0.14.0 Speeds Up Blockchain Syncing By 48% Bitcoin Core Bitcoin Wiki Tip: Bitcoin is a distributed, worldwide, decentralized digital money. Bitcoins are issued and managed without any central authority whatsoever: there is no government, company, or bank in charge of Bitcoin. You might be interested in Bitcoin if you like cryptography, distributed peer-to-peer systems, or economics. This way you could Running Macbook Bitcoin-qt Client Can Ethereum Br Turned Into Bitcoins up a SSH tunnel. Wenn ihr das macht ist mini fax online das Geld innerhalb von ein paar bitcoin os x libevent Sekunden gutgeschrieben und das Bankkonto damit wird Maßnahmen ergreifen, seinen Kunden diese neue virtuelle Währung zur ... Macbook just crashed trying to sync the blockchain for the first time from Bitcoin QT. Now I'm getting the "System error: Database corrupted" I didn't have any coins in the wallet. ... bitcoin-qt.exe -reindex -chainstate, it doesn´´t work. I have removed chainstate folder, because it was corrupted and I get to access again and recovery (C ...

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prevent bitcoin-qt client from crashing on the mac

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