host

This parameter is specified when you use bind mount host volumes. The contents of the `host` parameter determine whether your bind mount host volume persists on the host container instance and where it's stored. If the `host` parameter is empty, then the Docker daemon assigns a host path for your data volume. However, the data isn't guaranteed to persist after the containers that are associated with it stop running. Windows containers can mount whole directories on the same drive as `$env:ProgramData`. Windows containers can't mount directories on a different drive, and mount point can't be across drives. For example, you can mount `C:\my\path:C:\my\path` and `D:\:D:\`, but not `D:\my\path:C:\my\path` or `D:\:C:\my\path`.

This parameter is specified when you use bind mount host volumes. The contents of the `host` parameter determine whether your bind mount host volume persists on the host container instance and where it's stored. If the `host` parameter is empty, then the Docker daemon assigns a host path for your data volume. However, the data isn't guaranteed to persist after the containers that are associated with it stop running. Windows containers can mount whole directories on the same drive as `$env:ProgramData`. Windows containers can't mount directories on a different drive, and mount point can't be across drives. For example, you can mount `C:\my\path:C:\my\path` and `D:\:D:\`, but not `D:\my\path:C:\my\path` or `D:\:C:\my\path`.