A 32-bit computer has two selector channels and one multiplexorchannel. Each sel

Question

A 32-bit computer has two selector channels and one multiplexorchannel. Each selector channel supports two magnetic disk and twomagnetic tape units. The multiplexor channel has two line printers,two card readers, and 10 VDT terminals connected to it. Assume thefollowing transfer rates:

                                               Diskdrive                           800 KBytes/s

                                               Magnetic tape drive       200KBytes/s

                                               Lineprinter                        6.6 KBytes/s

                                               Card reader                      1.2 KBytes/s

                                               VDT                                       1 KBytes/s

Estimate the maximum aggregateI/O transfer rate in this system.

Explanation / Answer

Dear User, From given data, Each selector channel supports two magneticdisk and two magnetic tape units.Only one deviceat a time can be services on a selector channel.Thus So total magnetic tape drive=4*200 = 800 KBytes/s The multiplexor channel has two line printers, twocard readers, and 10 VDT terminals connected. Thus, Total line printers=2*6.6 =13.2 KBytes/s Total card readers=2*1.2 =2.4 KBytes/s           Total VDT=10*1 =10KBytes/s Therefore,the maximum aggregate I/O transferrate=800+800+13.2+2.4+10                                                                                        =1625.6 KBytes/s ITS HELPFUL TO YOU... ITS HELPFUL TO YOU...

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