st_read_attributes
result = st_read_attributes(un, 0x0408, buf, 10, st_uscsi_cmd);
ST_FUNC(ST_DEVINFO, st_read_attributes);
result = st_read_attributes(un, 0x0401, buffer, size, bufunc);
static int st_read_attributes(struct scsi_tape *un, uint16_t attribute,