The Register is covering an interesting story about journalling file systems on Mac OS X Server.
Apple has added journaling capabilities to its HFS+ Extended file system in a point.point update to the OS X Server software.
Journaling is a convenience feature for system administrators: it improves restart times after a crash on large volumes, as the system only needs to check the journal rather than every block on the disk. Linux users can take advantage of three journal file systems: ext3, ReiserFS and Silicon Graphics’ XFS.
Journalling == good.