Oh, most definitely safer, because it doesn't muck with allocation tables and other stupid garbage. Journaling is designed to happen slightly above the normal Filesystem 'layer', where operations can be tracked and passed onto the filesystem. A copy of the change record is stored in a file elsewhere, and all journalling does is 'replay' these changes back to the Filesystem APIs in reverse order back to a 'known good state'. Basically, it reverts files back if a file operation didn't complete when the crash occurred. Completed operations are not reverted, so data is not lost. Allocation tables and other such bits aren't even touched by journaling directly, but changed by the Filesystem code itself. So journaling is as safe as the filesystem it sits on top of is. Norton tried to modify the drive directly, which is the wrong way to do file recovery, IMO.
Regards, Adam
On Dec 29, 2003, at 10:13 PM, James G (Jim) Hardwick wrote:
I hope journalling is safer.
Jim
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