> Please have a look at the example for one of our SAP (SQL) servers -
> of course i know that the VSS 'volume' should also be backed up.
> The DB files are spread across a lot of volumes but only the one 
> with SAP services is listed in addition to C:\ .
> 
>  (http://postimg.org/image/pmtc58fs7/)

I am curious. If you don't choose the VSS volume, and the 2 volumes 
suggested - C: and H: - how can the DR saveset actually work, if you go to 
do an actual disaster recovery of this client? I don't see how you can get 
a function disaster recovery restore without choosing all the VSS volume, 
and C: and H:.

And if not, then *effectively* the DR saveset is the sum total size of all 
those volumes (since the recovered client won't work properly without 
them)

If you just type DISASTER_RECOVERY: in the saveset definition in your 
example (i.e., don't go choosing volumes, since that wouldn't give you a 
backup that you can use as a source for a DR recovery), you will get C:, 
H:, and the other volumes. How many gig is that?