unmounted

/AH0 N M AW1 N T IH0 D/
verb
  1. 1

    To reverse a mount operation; to instruct the operating system that the file system should be disassociated from its mount point, making it no longer accessible.

adjective
  1. 1

    Not mounted (in various senses).

    an unmounted horseman

Source: https://en.wiktionary.org/wiki/unmount, https://en.wiktionary.org/wiki/unmounted