Mark Cooke wrote:

> Hi,
> I've just converted my whole system on my test server to Ext3.
> and I really after some adivse of testing this.
> 
> Am I correct I the way I think Ext3 should work?
> 
> If I'm moving say a 650 iso from /tmp /pub on an Ext3 system and then
> halfway thru I pull the plug.
> What should the result be after it boots backup?
> 
> 1. Would the .journal note that it was trying to move a file and finish
> off the move.
> 2. Delete to destination file and leave the original in place.
> 3. I'm completely wrong and some one is going to correct me :-)
> 
> 
> Thanks in advance
> 
> Mark

Ext3 will not complete the activity that was happening when the power 
was interrupted.  It tries to bring the system back to a last known 
state, but you may have corrupted files after (such as a file that you 
were transferring).  It does help in that it does not have to go through 
the fsck check after an unclean shutdown (have you ever had to fsck an 
80 GB disk??).

Moving a file does not remove the source file until it has completed, 
thus in your example, the destination file would not be finished, but 
the source would be fully intact.  You could probably use rsync to 
continue moving the file, so that you wouldn't have to start over, but 
I'm not sure how much of an issue that is.

This is in the Reference guide for 7.3:
http://www.redhat.com/docs/manuals/linux/RHL-7.3-Manual/ref-guide/ch-ext3.html

Michael K. Johnson wrote this:

http://www.redhat.com/support/wpapers/redhat/ext3/


HTH

Forrest






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