[Ti] Drive Journaling. What's up widdat?

[Chris Olson]

On Saturday, April 12, 2003, at 07:44 PM, John Griffin wrote:

> I just downloaded a highly recommended utility called "Jaguar Cache 
> Cleaner"
> and am trying it out. One thing it does is enable something called Disk
> Drive Journaling. Well it sounds kinda impressive, so I checked it.
>
> The thing is, I haven't the faintest idea what this does! The only 
> thing I
> noticed is that it won't let me run fsck in single user mode without 
> doing a
> force command "-f". Can anyone enlighten me on this one? Is it a good 
> thing
> or a bad thing?

Journaling file systems keep a log or "journal" of metadata changes to 
the disk.  In the event of file system crash, unplanned powerdown 
(unclean shutdown), etc., it is easier and faster to recover.  On linux 
servers that used to run ext2 it would take a server with several large 
disks up to one hour to e2fsck and come back up if somebody bumped the 
power button.  With ext3 and the journal, the same machine comes back 
up immediately.

If you're interested in learning more about journaling, you can read 
this article:
http://www.linux-mag.com/2002-10/jfs_01.html

It's linux-based, but the concept is the same.
--
Chris