VSCSI(4) 6 ioctl, no read/write function VSCSI_I2T - dequeue SCSI command VSCSI_T2I - command completition message VSCSI_DATA_READ - read data from userland VSCSI_DATA_WRITE - write data to userland VSCSI_REQPROBE - probe a target VSCSI_REQDETACH - detach a target