Back when I worked with Xsan a lot more than I do now, one of the things we spent a lot of time doing was working with metadata and journal data on Xsan volumes. You can also view journal data for non-Xsan volumes. The hfs.util binary is used to view journal data about volumes. In this example, we’ll look at the journal size and location the boot volume of our system:
/System/Library/Filesystems/hfs.fs/Contents/Resources/hfs.util -I /Volumes/Macintosh\ HD
The output shows the size of the journal and the location, as follows:
/Volumes/Macintosh HD : journal size 40960 k at offset 0x1a38b000
