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50 Chapter 6 Working With Disks and Volumes
Managing Disk Journaling
Checking to See if Journaling is Enabled
You can use the mount command to see if journaling is enable on a volume.
To see if journaling is enabled:
$ mount
Look for journaled in the attributes in parentheses following a volume. For example:
/dev/disk0s9 on / (local, journaled)
Turning on Journaling for an Existing Volume
You can use the diskutil command to enable journaling on a volume without
affecting existing files on the volume.
Important: Always check the volume for disk errors using the fsck_hfs command
before you turn on journaling.
To enable journaling:
$ diskutil enableJournal volume
Example
$ mount
/dev/disk0s9 on / (local, journaled)
/dev/disk0s10 on /Volumes/OS 9.2.2 (local)
$ sudo fsck_hfs /dev/disk0s10/
** /dev/rdisk0s10
** Checking HFS plus volume.
** Checking extents overflow file.
** Checking Catalog file.
** Checking Catalog hierarchy.
** Checking volume bitmap.
** Checking volume information.
** The volume OS 9.2.2 appears to be OK.
$ diskutil enableJournal /dev/disk0s10
Allocated 8192K for journal file.
Journaling has been enabled on /dev/disk0s10
$ mount
/dev/disk0s9 on / (local, journaled)
/dev/disk0s10 on /Volumes/OS 9.2.2 (local, journaled)
Parameter Description
volume
The volume name or device name of the volume.
LL2354.book Page 50 Monday, October 20, 2003 9:47 AM