cbb2063e__SG_IO_ioctl_in_the_2_6_series_inimum_permission_requirements_Comments
[SCSI command] READ CAPACITY(16) [(draft) standard] SBC-3, MMC-4 [sg driver requires] O_RDONLY CAP_SYS_RAWIO [Comments] 
within SERVICE ACTION IN command. Needed for RAIDs larger than 2 TB
Linux SG_IO ioctl in the 2.6 series
Comments