Bitcoin node app stops working every time

1

Hello,

i bought the umbrel home and wanna install the bitcoin node app. but when its synchronizing the blocks, it stops working everytime and the state is “not running”
this are the log:
2025-10-18T09:23:50Z [error] ReadBlockUndo: Deserialize or I/O error - ReadVarInt(): size too large: iostream error at FlatFilePos(nFile=274, nPos=19633291)
2025-10-18T09:23:50Z [error] A fatal internal error occurred, see debug.log for details: Sync: Failed to write block 0000000000000000085e709dfd0a420f8773485c6813f3bab6a9284accba37cd to index database
2025-10-18T09:23:50Z basic block filter index thread exit
Error: A fatal internal error occurred, see debug.log for details: Sync: Failed to write block 0000000000000000085e709dfd0a420f8773485c6813f3bab6a9284accba37cd to index database
2025-10-18T09:23:50Z Shutdown: In progress…
2025-10-18T09:23:50Z addcon thread exit
2025-10-18T09:23:50Z opencon thread exit
2025-10-18T09:23:50Z net thread exit
2025-10-18T09:23:51Z msghand thread exit
2025-10-18T09:23:51Z DumpAnchors: Flush 2 outbound block-relay-only peer addresses to anchors.dat started
2025-10-18T09:23:51Z DumpAnchors: Flush 2 outbound block-relay-only peer addresses to anchors.dat completed (0.00s)
2025-10-18T09:23:51Z scheduler thread exit
2025-10-18T09:23:51Z Writing 0 mempool transactions to file…
2025-10-18T09:23:51Z Writing 0 unbroadcast transactions to file.
2025-10-18T09:23:51Z Dumped mempool: 0.000s to copy, 0.006s to dump, 27 bytes dumped to file
2025-10-18T09:23:51Z Flushed fee estimates to fee_estimates.dat.
2025-10-18T09:23:53Z Shutdown: done

what is happening and what should i do?

2

make sure your drive isnt dead, check the cables

3

the cables are fine in my opinion

4

The error occurs when the software tries to read the “undo” data (transaction reversal information) for a specific block from the disk, but the data at the specified file position (FlatFilePos) is unreadable or malformed (specifically, a variable-length integer indicating size is too large to be valid). This is almost always due to physical data corruption on the hard disk drive (HDD) or Solid State Drive (SSD) where the blockchain data is stored.

Potential underlying causes for the disk corruption include:

  • Weak or unstable power supply to the device
  • Failing storage drive hardware.
  • Sudden power outages or improper shutdowns during write operations.
  • Faulty data cable connecting the drive