Most disk drives have a single read/ write head for each disk surface. What is the advantage of suing multiple heads on each movable access arm?

Most disk drives have a single read/ write head for each disk surface. What is the advantage of suing multiple heads on each movable access arm? Correct Answer Reduced seek time

The advantage of suing multiple heads on each movable access arm in reduced seek time. Seek time is the time required to move the disk arm to the required track. Rotational delay or latency is the time it takes for the beginning of the required sector to reach the head. Sum of seek time (if any) and latency is the access time.
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Related Questions

Consider the following partial Schedule S involving two transactions T1 and T2. Only the read and the write operations have been shown. The read operation on data item P is denoted by read(P) and the write operation on data item P is denoted by write(P) Time Instance Transaction-id T1 T2 1 read(A)   2 write(A)   3   read(C) 4   write(C) 5   read(B) 6   write(B) 7   read(A) 8   Commit 9 read(B)     Schedule S   Suppose that the transaction T1 fails immediately after time instance 9. Which one of the following statements is correct?
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