On Sep 12, 2007, at 1:21 PM, Richard Mochnaczewski wrote:

Hi *,

We have been running TSM backups for a while now in a Windows
clustered environment. We are running into a problem and it appears
a whole volume has what seems like a full incremental backup being
taken when it shouldbe an incremental. IBM has confirmed that if
you enale Microsoft security on a volume that TSM will see that
whole volume as new and a full incremental will occur ( this
happened to us over the weekend on two volumes ). However, another
unrelated volume had a full incremental backup last night even
though we did a first full incremenatal a month ago and TSM has
been doing incremental backups ever since. The Microsoft  security
was NOT enabled on this volume. Does anyone know what can cause
this behaviour ?

There have been postings on this over the years, resulting from the
Windows administrator having performed mass permissions changes, that
being a conspicuous cause.

   Richard Sims