Complex sentence: Instead it points to a linked list of partition blocks, which by itself contains the actual partition data, their start, length, filesystem, their boot priority, their buffer memory type and their "flavor", though the latter was never used.
Split into simpler sentences: Instead it points to a linked list of partition blocks, which contain the actual partition data. The partition data includes the start, length, filesystem, boot priority, buffer memory type and "flavor", though the latter was never used.