You can upgrade existing Site Recovery Manager installations. The Site Recovery Manager upgrade process preserves existing information about Site Recovery Manager configurations.

For information about supported upgrade paths, see Upgrade Path > VMware vCenter Site Recovery Manager in the VMware Product Interoperability Matrixes at http://partnerweb.vmware.com/comp_guide2/sim/interop_matrix.php? before you upgrade.
Important: Upgrading from Site Recovery Manager 5.8.x to Site Recovery Manager 8.1 is not supported. You must first upgrade Site Recovery Manager from 5.8.x to 6.1.2.x. After upgrading Site Recovery Manager to 6.1.2.x, you must reconfigure the pairing between the Site Recovery Manager instances on the protected and the recovery site, before you continue with the upgrade to Site Recovery Manager 8.1.

Upgrading from Site Recovery Manager 6.0.x to Site Recovery Manager 8.1 is not supported. Upgrade Site Recovery Manager to a Site Recovery Manager 6.1.x. After upgrading Site Recovery Manager to 6.1.x, you must reconfigure the pairing between the Site Recovery Manager instances on the protected and the recovery site, before you continue with the upgrade to Site Recovery Manager 8.1. See Upgrading Site Recovery Manager in the Site Recovery Manager 6.1 documentation for information about upgrading to 6.1.x.

To revert to Site Recovery Manager 6.1 after upgrading to Site Recovery Manager 8.1, see Revert to a Previous Release of Site Recovery Manager.