STANDARD_COMPRESSION_UNIT
? STANDARD_COMPRESSION_UNIT : 0;
| ((1L << (STANDARD_COMPRESSION_UNIT
= 1 << (STANDARD_COMPRESSION_UNIT + vol->cluster_size_bits);
na->compression_block_clusters = 1 << STANDARD_COMPRESSION_UNIT;
a->compression_unit = STANDARD_COMPRESSION_UNIT;
!= STANDARD_COMPRESSION_UNIT)) {
a->compression_unit = STANDARD_COMPRESSION_UNIT; /* Windows