I had to migrate a server to different hardware; however, the hostname, IP address, and the DPX backup job name of the new server were retained as those of the old one. Why did the next backup run as base and not incremental?


The next backup type, base or incremental, will depend on three parameters:
  1. Job Name
  2. Node Name (it may be different from the hostname, but generally is same as the hostname)
  3. Volume Serial Number (VSN) of the volume(s)
If any of the above three parameters changes, next backup will be base. In your case, even though the job name and node name remained unchanged, the volume serial numbers of the volumes changed due to different hardware. This caused the next backup to run as base