sati_get_ata_sector_count
sati_set_data_byte(sequence, scsi_io, 48, sati_get_ata_sector_count(register_fis));
sati_set_sense_data_byte(sense_data, sense_len, 6, sati_get_ata_sector_count(register_fis));
sector_count = sati_get_ata_sector_count(register_fis);