<p>It ran about 10 hours, loaded 70% of blockchain, now always this error in debug.log on restart</p>
<p>2021-06-21T14:11:58Z ERROR: ReadBlockFromDisk: Errors in block header at FlatFilePos(nFile=1801, nPos=1334030)</p>
<p>2021-06-21T14:11:58Z *** Failed to read block</p>
<p>2021-06-21T14:11:58Z Error: A fatal internal error occurred, see debug.log for details</p>
<p>any suggestions ?? thx</p>

CC BY-SA 4.0
2021-06-21T17:36:46.130Z
Are you able to open that file manually? Try running a disk checker to look for bad sectors on the hard drive. Also check file permissions if they got changed somehow
noone392
CC BY-SA 4.0
2021-06-21T17:53:31.290Z
yes the file blk01801.dat can be opened.  It's the last file created and smaller than the other .dat files
Shiwu Stonehouse
CC BY-SA 4.0
2021-06-21T17:57:14.507Z
Hmm then I would try to scan for bad sectors.
noone392
CC BY-SA 4.0
2021-06-22T11:29:54.693Z
disk is good.  am going to remove everything and start over using the ADMIN account instead of an account with admin priv
Shiwu Stonehouse
CC BY-SA 4.0
2021-06-22T13:00:03.107Z
If this is windows you can right click the file and make sure the permissions are open so anyone can read and write
noone392
CC BY-SA 4.0
2021-06-24T14:05:36.200Z
Deleted everything and started over using the win10 admin account instead of a user account and all is synced and node running after about 24 hours.  thx for input
Shiwu Stonehouse
<bitcoin-core><blockchain><installation>
fatal error using Win Bitcoin core to create node
Shiwu Stonehouse
# fatal error using Win Bitcoin core to create node

(Asked by: username_0 on 2021-06-21)

It ran about 10 hours, loaded 70% of blockchain, now always this error in debug.log on restart

2021-06-21T14:11:58Z ERROR: ReadBlockFromDisk: Errors in block header at FlatFilePos(nFile=1801, nPos=1334030)

2021-06-21T14:11:58Z \*\*\* Failed to read block

2021-06-21T14:11:58Z Error: A fatal internal error occurred, see debug.log for details

any suggestions ?? thx

**Tags:** bitcoin-core, blockchain, installation

> **Comments:**
> **username_1**: Are you able to open that file manually? Try running a disk checker to look for bad sectors on the hard drive. Also check file permissions if they got changed somehow  
> **username_0**: yes the file blk01801.dat can be opened.  It's the last file created and smaller than the other .dat files  
> **username_1**: Hmm then I would try to scan for bad sectors.  
> **username_0**: disk is good.  am going to remove everything and start over using the ADMIN account instead of an account with admin priv  
> **username_1**: If this is windows you can right click the file and make sure the permissions are open so anyone can read and write  
> **username_0**: Deleted everything and started over using the win10 admin account instead of a user account and all is synced and node running after about 24 hours.  thx for input  

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## 0 answers

