os.sync()

# Python program to explain os.sync() method
   
# importing os module
import os
 
 
# File path 1
path1 = 'file.txt'
 
# File path 2
path2 = 'file2.txt'
 
# File path 3
path3 = 'file3.txt'
 
# Open the files and get
# the file descriptors
# associated with them
# using os.open() method
fd1 = os.open(path1, os.O_RDWR)
fd2 = os.open(path2, os.O_RDWR)
fd3 = os.open(path3, os.O_RDWR)
 
 
# Write a bytestring
str = b"GeeksforGeeks"
os.write(fd1, str)
os.write(fd2, str)
os.write(fd3, str)
 
 
# Sync. all buffers to disk
# i.e force write everything
# to disk using os.sync() method
os.sync()
print("Force write everything committed successfully")
 
# Close the file descriptors
os.close(fd1)
os.close(fd2)
os.close(fd3)
 
 
# os.sync() method
# will flush all buffers
# to disk.
# it may take a significant
# length of time

Force write of everything committed successfully