On 10/11/2013 02:58 AM, Richard van Denzel wrote: > Hi All, > > I am seeing the same kind of behaviour on a Windows 2012 cluster, which > from time to time backs-up the entire volume, without anything appently > being changed. > One of the answers I got was that there might be a group policy updating > security descriptors which triggers TSM to back them all up again. >
When you change ACLs, the files get backed up again, certainly. Only a modest set of permissions on a file can be recorded faithfully in the TSM database. If you do additional permissions ( quite common in winland ) then the ACLs are recorded in an addendum to the file, on the storage pool. This means that, if the extended permissions change, the whole file must be re-backed-up. So, it's not really a mystery why an heritable change at the root of a FS would cause a resending of the whole FS. - Allen S. Rout
