well i prefer the Lenovo LTO chassis. i have never found LTO to have any long term storage stability, and i got rid of my last LTO chassis last year, so i am not up on the current versions.
What is your current need for daily/weekly/monthly backup, how much churn do you forsee daily for incremental or differential backups? How often do you plan on sending the tapes offsite and replacing them with new ones? How much do you see your backup needs increasing over the next 60 months? Do you have enough of a time window for the backup to complete to tape in the time allotted (If not, you might need to do a Disk to Disk to Tape sequence to fit the amount of data into the time window you have.
We do a full backup quarterly, diff weekly. We already have a tape library, a Dell TL4000 with an LTO-6 drive, we are just upgrading. We've been doing tape backups for about 20 years now, I am just upgrading the library to something with current support and bigger tapes. Just wondering if anyone has experience with different companies than Dell, who is rebranded IBM. I don't need to know how to plan the backups, they are already currently happening, we are just growing our storage and so going to grow our backup library.