I recommend Exagrid.
It is fast not only in the backup mode like DD but in recovery too. It keeps half of the capacity without dedup (Landing zone), which makes recovery of the last few backups really fast without the need to rehydrate fragmented data.
This is the reason…
NetApp AFF/FAS (or OEM Lenovo DM series), with no doubt, is the best answer.
SVM provides total customer isolation; it's able to run FC/iSCSI/NVMe SAN. CIFS/NFS NAS, object S3 from one box.
It's able to scale up and out. It is possible to combine All-Flash and Hybrid…