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What is the time to read one sector

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Reference no: EM132430986

Problem: We want to store 300,000 logical records, each having a size of 120 bytes, on a disk with the following size characteristics: sector size is 512 bytes/sector, each track contains 96 sectors, each surface contains 110 tracks and the disk has 8 usable surfaces in total.

Required:

Question 1: Assume that the disk rotates at 360 rpm, what is the time to read one sector?

Question 2: To read each sector from the disk, the CPU uses interrupt-driven I/O, with one interrupt per byte. If the time to process each interrupt is 2.5 μs, how much time is spent handling I/O to read one sector?

Question 3: How much time would be spent handling I/O to read one sector if DMA was used instead of interrupt-driven I/O?

Reference no: EM132430986

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