On Jan 20, 2009, at 5:50 PM, Mark Stapleton wrote:

TSM treats files as whole entities. When you change permissions on a
file, TSM will back it up again.

I'm surprised Mark didn't at least allude to the SKIPNTPERMISSIONS
option for Windows client. It's a brutal way to address exactly this
situation. I call it "brutal" because once invoked, it postpones the
big backup until you do restores without the option. At that point, if
you don't want The Big Backup all at once, you're left with the option
of doing incrementals of subsets of your files with the option
disabled. I think one of my former clients regrets using it once when
they had a mass update of file permissions being rolled out; they were
trying to figure out how to disable the option in some managed way so
file permissions were once more backed up without having a huge surge
of file churn.

Just a thought,
Nick