Click here

journaled file system

A file system in which the hard disk maintains data integrity in the event of a system crash or if the system is otherwise halted abnormally. The journaled file system (JFS) maintains a log, or journal, of what activity has taken place in the main data areas of the disk; if a crash occurs, any lost data can be recreated because updates to the metadata in directories and bit maps have been written to a serial log. The JFS not only returns the data to the pre-crash configuration but also recovers unsaved data and stores it in the location it would have been stored in if the system had not been unexpectedly interrupted.



Top Terms

Connect with Webopedia

  • What is 250 GB Data Usage?

    What is 250 GB (250 gigabytes) and why is this phrase so popular? Webopedia explains what the phrase 250 GB means in reference to data storage...

    Read More »

Did You Know? Archive »

  • Quick Reference Archive »