I wanted to remove some of incremental backups because space is limited and I have many getting backed up throughout the month. I later learned that removing either one of incrementals or base backup would break the chain and I will not be able to restore when required. However here's the reply to question I found by staff:
If I was to backup ONLY the VBK and VBM file to tape, would this be enough to recover the VM in the event of a disaster? Is it necessary to have the VRB files as well?
No, .vbk file will be enough for recovering VM from it, should any disaster happen.
So I can still remove incrementals and restoration will work, provided base backup is not removed of course?
It would be good to have backup policy option for based on a desired quantity of backups rather than time period. Is this option planned for release?