You are viewing documentation for version: 1.0 (latest) | Version History sl_usbd_msc_scsi_callbacks_t Struct ReferenceUSB Device API > USB Device MSC SCSI API SCSI Callback Functions. #include <sl_usbd_class_msc_scsi.h> Data Fields void(* enable )(uint8_t class_nbr) void(* disable )(uint8_t class_nbr) void(* host_eject )(uint8_t class_nbr, uint8_t lu_nbr) SCSI Callback Functions.