block_cache_discard
extern void block_cache_discard(void *cache, off_t blockNumber,
block_cache_discard(fVolume->BlockCache(), fVolume->ToBlock(run),
block_cache_discard(bsdVolume->mnt_cache, cachedBlock, SECTORS_PER_CLUSTER(fatVolume));
block_cache_discard(gCache, 2, 1);
block_cache_discard(gCache, 2, 1);
block_cache_discard(GetVolume()->BlockCache(), blockIndex, 1);