Syntax,
What system, hardware and verion of Avid are you using. I’m betting that under the settings in media creation the boot drive has been eliminated from the media drives this is “Filter Out System Drive” also you should throw away all media databases in the OMFI folders. These may be msmFMID and msmMMOB depending on the version of Avid you are on. The data based will rebuild themselves upon relaunching the application.
SH