Database Software

I´ve been asked to cancel future backups to disk and to setup oracle´s suggested backup to the tape device only (which underwater is the tdpo from Tivoli´s storage manager).
This way the expensive disks can be freed from recovery data.

I´ve had my share of problems with the tdpo, but besides the problem of this gateway driver between RMAN and TSM I would like to know if this is best for the whole suggested backup strategy.

Somehow I´m not convinced in backing up to "tape" devices only; for it is slower than local disks, and because we had problems before with the driver, but there may be a lot more reasosn why I should or should not accept this desired goal to be best for our company.

I hope some of you can help me straighten my vision on this.

Robin