HA configuration

System Manager includes several features that enable you to keep operating a storage system even if its partner system in an HA configuration stops functioning. Takeover is the process in which a node takes over the storage of its partner. Giveback is the process in which the storage is returned to the partner.

When one storage system in an HA configuration undergoes a system failure and cannot reboot, the partner system in the HA configuration can take over the failed system's functions and serve network clients the data on the failed system's disks. This is known as a takeover. Additionally, you can issue a manual takeover at any time, to force a takeover: for instance, to allow scheduled maintenance to be performed on a storage system.

After the failed partner is running normally again, you issue a giveback, which returns the identity from the emulated storage system to the failed system, resulting in a return to normal operation.