BTRFS_SUPER_BLOCK_OFFSET
const uint8* block = cached.SetTo(BTRFS_SUPER_BLOCK_OFFSET / fBlockSize);
memcpy(&fSuperBlock, block + BTRFS_SUPER_BLOCK_OFFSET % fBlockSize,
if (write_pos(fDevice, BTRFS_SUPER_BLOCK_OFFSET, &fSuperBlock,
if (read_pos(fd, BTRFS_SUPER_BLOCK_OFFSET, superBlock,
blocknum = B_HOST_TO_LENDIAN_INT64(BTRFS_SUPER_BLOCK_OFFSET);
if (write_pos(fd, BTRFS_SUPER_BLOCK_OFFSET, &superBlock,