Can't Sync Bitcoin QT AND No Blockchain File on PC

Matt Corallo

hero member

Activity: 755

Merit: 515

Quote from: ?? on ??

All is fine. Actualy, it better than fine since I finaly used -reindex, saved so many GBs of download bandwidth and avoided yet another HDD torture!

-reindex still updates the whole block db, so even if it doesnt have to write the few GB in blk****.dat files, it still requires quite a bit of HDD torture, though it does it in less time compared to network download.

Matt Corallo

hero member

Activity: 755

Merit: 515

Quote from: ?? on ??

Reindex worked!

Dur, sorry. Yes, reindex does a full reimport, however it uses local copies of blocks instead of redownloading them.

deepceleron

legendary

Activity: 1512

Merit: 1036

2013-05-04 11:50:03 received block 00000000000000ff4aaa342f804a2731bb9f39a784a7f1d86685b35f144cd73a
2013-05-04 11:50:03 InvalidChainFound: invalid block=00000000000000ff4aaa342f804a2731bb9f39a784a7f1d86685b35f144cd73a height=234477 work=1131399971692442463964 date=2013-05-04 11:47:02
2013-05-04 11:50:03 InvalidChainFound: current best=0000000000000051e75ec922ddfed09dc3ca0a72f0e8bbc875d7b3fb370d7524 height=234410 work=1128500345104905542838 date=2013-05-04 01:24:51

This is the crux of the problem, your local blockchain database is corrupted and the client can't build on that. It doesn't have the intelligence to try to get the block 234410 again from the network and replace your screwed up version with the correct one.

You will need to delete the blocks and chainstate directories from your bitcoin data directory and attempt to resync the blockchain from the start. Typically this kind of random corruption indicates bad hardware, such as a bad sector on a hard drive or bad math from an overheating or overclocked CPU.

Matt Corallo

hero member

Activity: 755

Merit: 515

Quote from: ?? on ??

Started client with -reindex option instead, will report if issue is gonne or not once reindex is done.

I dont think reindex does what you think it does (unless you also cleared datadir)

Matt Corallo

hero member

Activity: 755

Merit: 515

Quote from: SammyBlackstar on May 04, 2013, 03:35:54 AM

How do I reindex blockchain? I've google and search the forum but I don't understand the limited instructions that people have posted.

You can try (backing up and then) deleting all the files but the wallet in your data directory

Quote from: zerodrama on May 04, 2013, 03:48:36 AM

You'll need the bootstrap.dat file. Then you'll need to wait as it gets all the blocks. In my case, it wouldn't stay open until I replaced it with the Debian one.

Which version of Debian, most of Debian's packages of Bitcoin are horribly out of date (to the point of potentially being risky to use)...

Quote from: ?? on ??

Something is definitely not right with Bitcoin, at least on my side. Since yesterday, all I'm getting after running Qt client are screens like one bellow:

You may also want to try clearing your data directory.

SammyBlackstar

newbie

Activity: 9

Merit: 0

Anyone have a solution in detail of how to fix this ?

zerodrama

sr. member

Activity: 364

Merit: 250

You'll need the bootstrap.dat file. Then you'll need to wait as it gets all the blocks. In my case, it wouldn't stay open until I replaced it with the Debian one.

SammyBlackstar

newbie

Activity: 9

Merit: 0

My Bitcoin QT is stuck syncing at 98.97%. I last ran the program on April 17th and ran it recently to sync up.

I've uninstalled and re-installed.

When I re-install it automatically goes to 98.97%.

I've searched my computer but I don't seem to have the blockchain file on my computer at all to delete.

How do I reindex blockchain? I've google and search the forum but I don't understand the limited instructions that people have posted.

Topic: Can't Sync Bitcoin QT AND No Blockchain File on PC (Read 1539 times)