Bitcoin-QT database corrupted | Bitcointalksearch.org

Valerian77

sr. member

Activity: 437

Merit: 255

Maybe I got the root cause for the problem. Some time ago I started to use a RAM disc for all temporary files. This disc is limited in size (compared to the hard disc). I never really switch off the system. Probably the RAM disc was full. - I am not 100% sure but it seems to be the only possibility.

I do not know if this may be an issue for the Bitcoin-Qt behavior. But at least it should be considered in some kind of diagnosis information. Currently the only information available is the debug.log (this is not in a temporary location) is:

Quote

LevelDB read failure: Corruption: block checksum mismatch

Valerian77

sr. member

Activity: 437

Merit: 255

OK I made the hard step and deleted everything except the wallet.dat.

Now the Bitcoin-QT client works again but has to reload 252 weeks of transaction history.

Not a very big issue. But I am little concerned about the appearance of this bug in this version on my system.
That is because
1. the client version is the most resent one
2. hard disc is a SSD 830 which should not create any read/write errors
3. the system (Asus N56VZ, 8GB RAM, I7 2610QM) should have enough capacity in any manner to handle the Bitcoin wallet

One weak point may be the operating system - Windows7 Home Premium. I use this because it was delivered with the laptop and it worked so far with all drivers.

I have no explanation for this serious bug.

From this experience I will definitely switch to cold paper wallets.

/dev/null

sr. member

Activity: 308

Merit: 250

Import your wallet into some other client like electrum,armory,blockchain and use it.
Thats the fastest way to access your coins.

wtogami

sr. member

Activity: 263

Merit: 250

This is Mac?

https://bitcointalksearch.org/topic/fixed-macos-x-leveldb-corruption-bounty-1000-btc-2002-ltc-337294
You will want to read this.

Valerian77

sr. member

Activity: 437

Merit: 255

Hmm -

is there any faster solution ?

here is the error from the debug.log:

Quote

init message: Verifiziere BlÜcke...
Verifying last 288 blocks at level 3
No coin database inconsistencies in last 87 blocks (37317 transactions)
block index 25330ms
init message: Lade Brieftasche...
nFileVersion = 80500
wallet 23ms
LevelDB read failure: Corruption: block checksum mismatch
*** Systemfehler: Database corrupted
init message: Lade Adressen...
Loaded 15462 addresses from peers.dat 99ms
Flush(false)
wallet.dat refcount=0
wallet.dat checkpoint
wallet.dat detach
wallet.dat closed
DBFlush(false) ended 7ms
StopNode()
Flushed 15462 addresses to peers.dat 54ms
Committing 40530 changed transactions to coin database...
Flush(true)
wallet.dat refcount=0
wallet.dat checkpoint
wallet.dat detach
wallet.dat closed
DBFlush(true) ended 7ms

the db.log file is empty.

The Bitcoin-QT version is v0.8.5-beta

BadAss.Sx

legendary

Activity: 1526

Merit: 1002

Bulletproof VPS/VPN/Email @ BadAss.Sx

Delete everything in you Bitcoin-Qt folder except the wallet.dat and start all over again. Watch out, this one takes days!

Valerian77

sr. member

Activity: 437

Merit: 255

Hello

today the Bitcoin-QT suddenly stopped with the error message 'Database corrupted". The wallet is encrypted and it does not help to restore a formerly working backup of the wallet.dat.

How do I have to handle this?

Topic: Bitcoin-QT database corrupted (Read 3137 times)