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(solution) Hi, I have 3 questions here that require the use of formulas to


Hi,


I have 3 questions here that require the use of formulas to answer questions about storage capacity, read times and serial access time. Please show your work.


I need these completed within the next 7 hours.


Please show work


Thank you


Please show work!

 

Given: A magnetic disk drive has the following characteristics:

 

10,000 RPM spin rate

 

2ns head-to-head switching time

 

3 us average track-to-track seek time

 

5 platters, 1024 tracks per platter side recorded on both sides, 50 sectors per track on all

 

tracks

 

1) What is this drive?s storage capacity assuming 512 byte sector size?

 

2) How long will it take to read the drive?s entire contents sequentially, assuming the data is

 

organized for maximum read efficiency and the read occurs cylinder by cylinder?

 

3) What is this drive?s serial access time, recalling that serial access time is the time required to

 

read the second of two sequential sectors? HINTS: Question 2 is asking you to compute the time it would take to sequentially

 

read the entire disk. Remember, there would be no rotational delay when

 

reading sequentially, so the formula the total TTT seeks + HTH switches +

 

the time required to read all of the tracks (total number of tracks / rotation

 

speed).

 

Question 3 is asking you to compute the time it would take to read the

 

second of two sequential sectors, not the entire disk. There are a few ways

 

to do this, but the easiest is to simply take the time to read the entire disk

 

and divide it by the number of sectors on the disk. This would give you an

 

average time to read one sector.

 


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