A hard disk is connected to a 50 MHz processor through a DMA controller. Assume that the initial set-up of a DMA transfer takes 1000 clock cycles for the processor, and assume that the handling of the interrupt at DMA completion requires 500 clock cycles for the processor. The hard disk has a transfer rate of 2000 Kbytes/sec and average block transferred is 4 K
bytes. What fraction of the processor time is consumed by the disk, if the disk is actively transferring 100% of the time?
Correct answer is '30 us for initialisation and termination and 2 ms for data transferCpu time is consumed only for initialisation and termination % of cpu time consumed = 30us/ (30us +2ms)* 100 = 1.5%'. Can you explain this answer?

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This discussion on A hard disk is connected to a 50 MHz processor through a DMA controller. Assume that the initial set-up of a DMA transfer takes 1000 clock cycles for the processor, and assume that the handling of the interrupt at DMA completion requires 500 clock cycles for the processor. The hard disk has a transfer rate of 2000 Kbytes/sec and average block transferred is 4 Kbytes. What fraction of the processor time is consumed by the disk, if the disk is actively transferring 100% of the time?Correct answer is '30 us for initialisation and termination and 2 ms for data transferCpu time is consumed only for initialisation and termination % of cpu time consumed = 30us/ (30us +2ms)* 100 = 1.5%'. Can you explain this answer? is done on EduRev Study Group by Computer Science Engineering (CSE) Students. The Questions and Answers of A hard disk is connected to a 50 MHz processor through a DMA controller. Assume that the initial set-up of a DMA transfer takes 1000 clock cycles for the processor, and assume that the handling of the interrupt at DMA completion requires 500 clock cycles for the processor. The hard disk has a transfer rate of 2000 Kbytes/sec and average block transferred is 4 Kbytes. What fraction of the processor time is consumed by the disk, if the disk is actively transferring 100% of the time?Correct answer is '30 us for initialisation and termination and 2 ms for data transferCpu time is consumed only for initialisation and termination % of cpu time consumed = 30us/ (30us +2ms)* 100 = 1.5%'. Can you explain this answer? are solved by group of students and teacher of Computer Science Engineering (CSE), which is also the largest student community of Computer Science Engineering (CSE). If the answer is not available please wait for a while and a community member will probably answer this soon. You can study other questions, MCQs, videos and tests for Computer Science Engineering (CSE) on EduRev and even discuss your questions like A hard disk is connected to a 50 MHz processor through a DMA controller. Assume that the initial set-up of a DMA transfer takes 1000 clock cycles for the processor, and assume that the handling of the interrupt at DMA completion requires 500 clock cycles for the processor. The hard disk has a transfer rate of 2000 Kbytes/sec and average block transferred is 4 Kbytes. What fraction of the processor time is consumed by the disk, if the disk is actively transferring 100% of the time?Correct answer is '30 us for initialisation and termination and 2 ms for data transferCpu time is consumed only for initialisation and termination % of cpu time consumed = 30us/ (30us +2ms)* 100 = 1.5%'. Can you explain this answer? over here on EduRev! Apart from being the largest Computer Science Engineering (CSE) community, EduRev has the largest solved Question bank for Computer Science Engineering (CSE).