The source jobs run every 2 hours from 08:00 until 21:00 every weekday, 210 copies are to be kept (6 weeks worth)
Each job backs up a separate Hyper-V VM.
Each job uses reverse incremental - I like the fact that I always have an effective full backup without having to add any incrementals to it. Its this full backup that I want to send to tape.
Every backup to tape is the full version, no incrementals. We have just purchased a LTO7 drive and are using LTO6 tapes for this which has sufficient capacity for us now. (We just ran out of space on LTO5)
Tuesday tape is kept for min 2 years, new Tue tape every week. (We have run like this for the past 12 years and it's proven successful for us)
As we are just now introducing Veeam, I hope that the majority of restores are going to be from disk, especially as they are typically just individual user files from a Full VM backup.
Having a backup to tape is just a nice to have, knowing you have something you can hold in your hand and store in a firesafe is a nice warm feeling
Once this is all up and running I will also look to copy these backups to an off-site server.
So once this is finished we can do restores for 6 weeks from disk or 2 years from tape, plus off-site copies for DR.
Last step will be to investigate Veeam Replication for the running VM's, currently we use the native Server 2012 R2 Hyper-V Replication, but it sometimes stops and needs to be manually kicked off, which is a pain to monitor.