About the HotAdd
Proxy
The HotAdd backup proxy must be a virtual machine. HotAdd
involves attaching a virtual disk to the backup proxy, like attaching disk to a virtual
machine.
The HotAdd proxy must have access to the same
datastore as the target virtual machine, and the VMFS version and data block
sizes for the target VM must be the same as the datastore where the HotAdd
proxy resides.
In some implementations, a different HotAdd
proxy backs up Windows versus Linux virtual machines. In other backup implementations,
the same type of HotAdd proxy backs up both.
For parallel backup, sites can deploy
multiple HotAdd proxies.