I have to admit I have only done a quick search of the forums, to see if I could find an answer for this. I will refer to what I found, although they don't answer my question.

I have a customer with an EMC DataDomain DD2500. Half is used as a VTL and the other half for CIFS. The VTL part was used by another vendor backup solution that we are now getting rid of.

We want to move the existing GFS rotation from CIFS to VTL while keeping retention! There are yearly backups on there and we want to free up the disk used by CIFS so VTL can use it instead. And since we are redirecting the existing GFS rotation to the VTL (new repository) the cleanup won't happen on the old, now non-used repository. Or am I missing some great existing feature here?

The reasons for moving from CIFS to VTL are two:
1) Performance: moving from 1Gb LAN to 4Gb SAN
2) Security: think crypto viruses...
Why not go DD Boost? Customer doesn't have the money for it and if VTL works, why spend them even if they did have them?
I found one thread here about moving a DD repository from CIFS to DD Boost (veeam-backup-replication-f2/moving-back ... 23978.html), but I can't see this helping us. How would the VTL know which data belongs on which "tape"? And how would VBR know??
There is also the useful KB 1729, if you move from disk to disk. But... no help in this case.

Veeam, I can see this being a problem for a lot of users not too distant in the future. Moving any kind of repository (especially GFS) between disk, tape, HP Catalyst or EMC DD Boost repositories will come to happen and we all want to keep existing retention. Here keeping a yearly backup for 10 years isn't uncommon and even if we stretch the lifetime of the hardware running the repository I would expect to have to move the repository at least once during those 10 years. Yes, VBR isn't an archive solution, but looking back, from my experience a lot of companies use their backup for this purpose as well.
Oh well, feels like I digress somewhat. Back to the original question: How can I move a GFS rotation from a disk repository to a tape repository while keeping retention and awareness in VBR?

// Matts