My thoughts on this:

We have thousand+ volumes on 100 GB VLS (Tape Emulation on Disk), which 
will be cloned to 1+ TB LTO-4 Tape-drives (8 drives in a Changer)

The way we've done the manual clone in NMC GUI:

Select the savesets you want, estimate the total size of the savesets 
(thus estimating number tape-volumes we need).

Our typical savesets in a group contain about 7 TB on weekend-fulls (about 
60 VLS tape volumes).

We sort our savesets based on VLS volumes, select some savesets at the 
boundary of VLS volume - selected-savests size adding upto about 1 TB, 
clone those selected savesets.

Now, you select new sub-set of the originally selected savesets, then 
clone those savesets. Keep iterating this process to make/chose about 7 
subsets of 1 TB in size, proceed to clone

Wish there is a easier way though :-)

Thanks
Sree

To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type "signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER