# Executes at 2am on all Saturdays Except the first Saturday of the month (Saturdays other than 1st can fall only after 7th ).
# tune2fs -l /dev/sda1 | grep Block
Block count: 4980736
Block size: 4096
Blocks per group: 32768From this example, you can see that the default block size for the filesystem on /dev/sda1 partition is 4096 bytes, or 4k. That's the default block size for ext3 filesystem.