Unknown option: "-8" Unix manual page for diskmanagementstartup. (host=minya system=Darwin)
diskmanagementstartup(8)  BSD System Manager's Manual diskmanagementstartup(8)

NAME
     diskmanagementstartup -- DiskManagement.framework helper tool

SYNOPSIS
     diskmanagementstartup

DESCRIPTION
     diskmanagementstartup is a tool that runs at startup to perform certain
     cleanup and configuration actions related to or armed by the DiskManage-
     ment framework and its diskmanagementd daemon.  This tool is itself a
     DiskManagement client.

     There are no configuration options.  Users should not run this program
     manually.

SEE ALSO
     diskmanagementd(8), diskarbitrationd(8), diskutil(8), mount(8)

macOS                            15 June 2016                            macOS