ext3 is a journaled Linux file system format.
ext3 is a Linux file system format, released in 1999 and has been the typical defeault file system format until recently. Its successor is ext4.
ext3, or third extended filesystem, is a journaled file system that is commonly used by the Linux kernel. It is the default file system for many popular Linux distributions, including Debian....the filesystem was merged with the mainline Linux kernel in November 2001 from 2.4.15 onward.Its main advantage over ext2 is journaling, which improves reliability and eliminates the need to check the file system after an unclean shutdown.