0n Wed, Mar 11, 2009 at 09:01:54AM +1100, Wilkinson, Tim wrote: 

    >I've recently moved some data to a different volume and did a full
    >backup after the move. I then updated the permissions of the data in the
    >new volume and as expected, the incremental backup backed-up the data in
    >the new volume.
    >However, the scheduled incremental that ran last night is still going
    >and it seems to be backing up all the data in the new volume, almost
    >like it had never known it had been backed-up incrementally the previous
    >night. I would expect some of the files to have been changed since the
    >first incremental but not the whole lot.
    >I'm guessing this may have something to do with archive bits and NBU
    >thinks the files haven't already been backed-up incrementally.
    > 
    >Why would NBU not think the files have been backed-up and keep
    >backing-up all the same files twice in a row?

G'Day Tim,

CC'ing RB to keep him aware of the archive bit issues.

Something must be resetting the archive bit(s) on your filesystem.
When you do a permission change did that permission change traverse
(walk) the entire (or a large part) of the filesystem ? If so then
the archive bit would have been reset on all those files/directories.

As I have said in the past, i wish we would stop using the archive bit
and move toward using mtime within our NBU environment. Its like banging
my head against a brick wall though.

You may also want to read:

"The Windows archive bit is evil and must be stopped"

http://www.computerworld.com/hardwaretopics/storage/story/0,10801,100697,00.html

 -aW

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