Only files added by VIB installation persist a reboot of ESXi. All files manually added to visorfs do not persist an ESXi host reboot.
4.1 关于VIB（vSphere Installation Bundle）
VIB – A VIB is an ESXi software package. VMware and its partners package solutions, drivers, CIM providers, and applications that extend the ESXi platform as VIBs. VIBs are available in software depots. You can use VIBs to create and customize ISO images or to upgrade ESXi hosts by installing VIBs asynchronously onto the hosts.