The system on which you deploy Site Recovery Manager must meet specific hardware requirements.

Minimum System Requirements for the Site Recovery Manager Virtual Appliance

Site Recovery Manager is distributed as a 64-bit virtual appliance packaged in the .ovf format. You must deploy the virtual appliance in a vCenter Server environment by using the OVF deployment wizard on an ESXi host.
Deployment type Requirement
Light 2 vCPU, 8 GB RAM, one 16 GB hard disk, and one 4 GB hard disk, 1 Gbit network card. You can use the light deployment type for deployments that protect less than 1000 virtual machines.
Standard 4 vCPU, 12 GB RAM, one 16 GB hard disk, and one 4 GB hard disk, 1 Gbit network card. Use the standard deployment type for deployments that protect more than 1000 virtual machines.