Upon successful completion, the Media Robot Driver library
    routines that access a medium-changer return the value MRD_
    STATUS_SUCCESS. On a failure, one of the following errors may
    be returned. The Media Robot Driver library will attempt to map
    SCSI failures to one of a small group of error codes, but not all
    errors have been anticipated.

    Many of the MRD routines accept a log_info argument that is a
    character array. When a SCSI error occurs, the the Sense Key,
    additional Sense Code and Additional Sense Code Qualifier are
    formatted into the space provided. If the error is an operating
    system specific error, then the text corresponding to the error
    will be copied into the space provided.