Final answer:
The potential overuse of a single parity disk is avoided in RAID level 5 by distributing data and parity information across multiple disks.
Step-by-step explanation:
The potential overuse of a single parity disk is avoided in RAID level 5. In RAID 5, data and parity information is distributed across multiple disks, with the parity information calculated based on the data stored on the other disks. This prevents any single disk from being a bottleneck or point of failure. RAID levels 3 and 4 also use parity, but they have a dedicated parity disk which can be a potential point of overuse.