Symbol: UDF_MT_RO
usr/src/uts/common/fs/udfs/udf_vfsops.c
1263
if ((udf_vfsp->udf_mtype < UDF_MT_RO) ||
usr/src/uts/common/fs/udfs/udf_vfsops.c
1265
udf_vfsp->udf_mtype = UDF_MT_RO;