Tony, if your exmerging your IS to pst files that 6.5gb db could balloon due
to the fact you will be loosing single instance storage...

fyi.
Mark


How does an incremental backup for TDP for Exchange work? Since Tivoli does
not backup individual mailboxes as files but instead does a Directory and
Information Store backup, would a single message sent or received constitute
an Information store change, therefore resulting in a complete backup
instead of the selected Incremental backup? Or, is the TDP designed to
recognize only the changes and only backup those parts of the Information
Store that have changed with the possibility of a restore only if you have
at least one good Full backup?

I am only asking because we currently have 3 Exchange 5.5 servers with 40GB
average databases doing nightly full backups. Will going to a 6 day
Incremental 1 Full be beneficial with our current retention settings (as
follows)?

Versions Data Exist     30
Versions Data Deleted   0
Retain Extra Versions   30
Retain Only Versions    30

Also, do these retention settings seem OK. I was not involved with Tivoli
when they were set and would value another opinion.

Thanks to all,
Mark Bertrand