udf_write_phys
error = udf_write_phys(context.vat_contents, phys, sects);
return udf_write_phys(blob, phys, sectors);
error = udf_write_phys(data, phys, ext);
return udf_write_phys(dscr, location, sectors);
extern int udf_write_phys(void *blob, uint32_t location, uint32_t sects);