You need the Unisphere CLI User Guide for VNXe.  You can find it on the Support by Product page for VNXe, under Documentation.

The Unisphere CLI guide will not have detailed content about the VNXe system CLI. Service scripts (all those beginning with svc_) are designed for troubleshooting in special use cases for the VNXe system specifically.

The svc_reinit is a destructive action. Use of it will erase all system configuration including allocated storage, known hosts and management interface. It should only be used in the decommissioning or reallocation of a system to bring it to a factory-restore state. I'll bold my point to make it clear ---> If you ever have a situation where it seems like the only option, you should absolutely open a case with support to get the proper assistance from experts.

A similar script used for troubleshooting would be svc_reimage -- svc_reimage writes the VNXe OS image stored in the backend repository to the onboard SSD. Unlike the svc_reinit script, svc_reimage maintains the persistent configuration (including hostname, storage configuration, and host registration). This behavior makes svc_reimage nondestructive to user data.

Documentation is scheduled to be available, but we have a stringent sanity process before it can be published. We appreciate your patience and feel free to reach out here as well as on Spiceworks EMC page here: community.spiceworks.com/pages/emc