Ubuntu also uses the ext3 file system, developed by Dr. Stephen C. Tweedie and used by the majority of Linux distributions. ext3 supports a form of low-level storage data handling known as journaling, previously available only under expensive computer platforms. Journaling is accomplished using a variety of techniques, but the end result aims to ensure that data remains intact on the disk despite a system crash, a power outage, or other mishap.
However, because Ubuntu is designed to be flexible and accommodating of all new Linux technologies, you can use other file systems for your workstation or server. This includes IBM JFS, a journaled file system designed for servers and used on many enterprise-level platforms. If you want to take advantage of fast restarts and enjoy good performance and reliability, you can use JFS as an alternative to ext3. However, ext3 offers benefits such as quick switching between legacy ext2 file systems and widespread use in the Linux community.
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