Here are the details of that error code (19):
The media is write protected.
You need to consult the cluster log (use
Get-ClusterLog to get that) for additional details about what writes failed within the cluster operation being performed. Check that out and update your question with any errors you see.
That being said, combined with this symptom:
…if you reboot second node, database wont up.
You might be experiencing disk problems. Check the Windows system event log and SQL Server error log for messages related to failed writes or corruption.