HelenOS sources

DATA_FS           142 uspace/srv/fs/exfat/exfat_fat.c 			return block_get(block, nodep->idx->service_id, DATA_FS(bs) +
DATA_FS           201 uspace/srv/fs/exfat/exfat_fat.c 		rc = block_get(block, service_id, DATA_FS(bs) +
DATA_FS           210 uspace/srv/fs/exfat/exfat_fat.c 		rc = block_get(block, service_id, DATA_FS(bs) +
DATA_FS          1246 uspace/srv/fs/exfat/exfat_ops.c 	printf("Data first sector: %d\n", DATA_FS(bs));
HelenOS homepage, sources at GitHub