Module header 

Sparse extent header (Virtual Disk Format 1.1, §4.1).

Structs

SparseExtentHeader

Parsed fields from the 512-byte SparseExtentHeader.

Constants

GD_AT_END

Sentinel gdOffset in the primary header of a streamOptimized extent.

MAGIC

MAX_NUM_GTES_PER_GT

Maximum grain-table entries per grain table (VDF 1.1 §4.1: numGTEsPerGT = 512).

SECTOR_SIZE

VERSION

VERSION_STREAM_OPT

VERSION_ZEROED_GRAIN

Version 2 enables the zeroed-grain feature (GTE == 1 → explicit zero grain).