cbb2063e__SG_IO_ioctl_in_the_2_6_series_inimum_permission_requirements_Comments
[SCSI command] SERVICE ACTION IN [(draft) standard] SPC-4, SBC-3 [sg driver requires] O_RDONLY CAP_SYS_RAWIO [Comments] 
READ CAPACITY (16) service action in here
Linux SG_IO ioctl in the 2.6 series
Comments